Document:

<PAGE>   1
***Portions of this exhibit marked by brackets ("[ ]") have been omitted
pursuant to a request for confidential treatment. The omitted portions have
been filed separately with the Securities and Exchange Commission.***

                                                                   EXHIBIT 10.34

                                 AMENDMENT NO. 6
               TO THE TERRESTRIAL REPEATER NETWORK SYSTEM CONTRACT

THIS AMENDMENT NO. 6 TO THE TERRESTRIAL REPEATER NETWORK SYSTEM CONTRACT (the
"Amendment No. 6") is entered into on this 8th day of January 2001 (the
"Effective Date") by and between XM Satellite Radio Inc., a Delaware corporation
with its principal offices located at 1500 Eckington Place, N.E., Washington,
D.C. 20002 (hereinafter "Owner"), and LCC International, Inc., a Delaware
corporation with its principal offices located at 7925 Jones Branch Drive,
McLean, Virginia 22102 (hereinafter "Contractor").

WHEREAS, the Parties entered into and executed the Terrestrial Repeater Network
System Contract dated August 18, 1999 and several amendments thereto (hereafter
collectively referred to as the "Contract") whereby such Contract provides for
the procurement by Owner from Contractor of the engineering, design,
construction and testing of the Terrestrial Repeater Network System;

WHEREAS, the Parties have been discussing certain issues relating to the
Contract; and

WHEREAS, the Parties have reached agreement on such issues;

NOW THEREFORE, in consideration of the above premises and the mutual covenants
and agreements contained herein, and for other good and valuable consideration,
the receipt of which is hereby acknowledged, the Parties agree the Contract is
hereby amended as follows:

DEFINITIONS

1.      Unless otherwise defined herein, capitalized terms used herein shall
        have the meaning set forth in the Contract.

        (A)     "High-Power Site" means a Site with a [           ] watt
                repeater installed or mounted on the Site.

        (B)     "Supplemental Site" means a Site not subject to the revised
                Baseline Schedule (also referred to in the Contract as the
                Initial City Schedule) or liquidated damages schedule set forth
                in Table 14.1. The Supplemental Sites are currently estimated to
                be [  ] Sites. The specific Supplemental Sites will be updated
                by the Parties as required during the Term of the Contract.

SCOPE OF WORK

2.      Contractor shall complete work on the Sites identified in Schedule A as
        follows, as summarized in Schedule A (the "Required Work") and as the
        work is further described in Exhibit B (Statement of Work) and Exhibit C
        (Contract Pricing, Payments and Milestone Achievement Criteria):

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                                                                    CONFIDENTIAL

        (A)     The "Site Acquisition Sites": Approximately [   ] Sites through
                Site Acquisition (i.e., Work Units M1, RF1, RF2, RF3, AE1(a),
                AE4, SA1, SA2, SA3 and RC 1 - 6).

        (B)     The "Zoning Sites": Approximately [   ] Sites (of the above
                approximately [   ]) through Zoning (i.e., Work Units M1, RF1,
                RF2, RF3, RF4 (for Sites with repeaters installed by May 1, 2001
                only and excluding High-Power Sites), RF5 (with MCM Testing, as
                further described in paragraph 2(E) below, substituted for CW
                testing), RF6 (for Sites with repeaters installed by May 1, 2001
                only and excluding High-Power Sites), AE1(a), AE1(b), AE2(a) (as
                defined in paragraph 11(C) below), AE3, AE4, ZN1, ZN2, ZN3, SA1,
                SA2, SA3, and RC 1 - 7 (RC 7 for Sites with repeaters installed
                by May 1, 2001 only)).

        (C)     The "Construction Sites": approximately [  ]  Sites (not to
                exceed [   ] Sites) (of the above approximately [   ]) through
                Site Construction and Interim Maintenance (Work Units M1, RF1,
                RF2, RF3, RF4 (for Sites with repeaters installed by May 1, 2001
                only and excluding  High-Power Sites), RF5 (with MCM Testing
                substituted for CW testing), RF6 (for Sites with repeaters
                installed by May 1, 2001 only and excluding High-Power Sites),
                AE1(a), AE1(b), AE2(a), AE2(b) (as defined in paragraph 11(C)
                below), AE3, AE4, ZN1, ZN2, ZN3, SA1, SA2, SA3, RC 1 - 7 (RC 7
                for Sites with repeaters installed by May 1, 2001 only), SC1 and
                SC2 (for Sites with  repeaters installed by May 1, 2001 only)
                and Interim Maintenance).

        (D)     For all Zoning and Construction Sites, Owner shall purchase from
                Contractor and Contractor shall provide Satellite Receive and
                Repeater Transmit Antennas and, for High-Power Sites, Contractor
                shall also provide shelters, all in accordance with a schedule
                to be provided by Owner. For those Sites not constructed by
                Contractor, Owner shall designate where such antennas and
                shelters are to be shipped, and shall provide such other
                shipping information reasonably requested by Contractor, within
                5 Business Days of receiving Contractor's request. Owner, as a
                pre-approved Permitted Reimbursable Expense, will pay all
                shipping charges beyond normal 3 to 5 day ground delivery to the
                extent requested by Owner for Sites not constructed by
                Contractor. Contractor shall prepare for Owner's review and
                approval a forecast(s) of antenna and shelter requirements for
                all Sites except Construction Sites on a periodic basis (but no
                less frequently than monthly). Owner shall provide Contractor
                with its comments or approval within 5 Business Days of receipt
                of the forecast; otherwise, Contractor may submit the forecast
                to the relevant manufacturer as submitted by Contractor to
                Owner, which shall be deemed approved by Owner. Contractor will
                incorporate Owner's reasonable comments. Owner shall purchase
                from Contractor all such antennas and shelters ordered by
                Contractor from the relevant manufacturer pursuant to the
                approved forecast(s).

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                                                                    CONFIDENTIAL

        (E)     For all Sites, Contractor shall perform MCM testing ("MCM
                Testing") (with one and/or two satellites, as available) in
                accordance with the revised Baseline Schedules (as described in
                paragraph 25 below) (also referred to in the Contract as the
                Initial City Schedule). The scope of MCM Testing and analysis
                will be agreed to by the Parties within 30 days of the Effective
                Date of this Amendment No. 6. The Parties will work together
                cooperatively to define a scope and schedule that can be
                performed within the price set forth in paragraph 11(A) below.

3.      By way of clarification, the Construction Documents required by Work
        Unit AE2 shall be signed and sealed by a registered professional
        engineer and in sufficient detail to obtain building permits for the
        Sites. Owner shall provide Contractor with its requested corrections and
        modifications on the Construction Documents within 14 Calendar Days of
        receipt of such Construction Documents. Contractor shall make such
        requested corrections and modifications.

4.      By way of clarification, Work Unit SC1 (Substantial Completion) includes
        installation of antennas, but excludes provisioning of telco services
        (other than coordination with Global Digital Datacom Services), and Work
        Unit SC2 (Completion of Construction) includes receiving and installing
        the repeater unit.

5.      Prior to May 15, 2001, in the event additional engineering, analysis, or
        similar work is required beyond the scope agreed to above with respect
        to the Sites as identified on Schedule A, Contractor shall provide such
        additional services on the basis provided in the Contract or, if not so
        provided, on a Task Order Pricing basis.

6.      For each of the Sites identified in Schedule A, "Work Completion" is
        achieved when Contractor completes the Required Work for such Site in
        accordance with the Contract.

7.      In the event that, prior to the date hereof, Contractor has commenced
        work on any Work Unit not listed in paragraphs 2(A), 2(B) or 2(C) above
        for any Site, then Contractor shall complete the Work Units, as agreed
        to by the Parties within 21 Calendar Days of the Effective Date of this
        Amendment No. 6, and Contractor shall be paid for all Work Units
        completed, and for all unpaid work-in-progress on any Work Unit not
        completed with the payment equal to the percentage of the applicable
        Work Unit price that is equal to the percentage of the Work Unit, as
        determined by the Parties, actually completed on the applicable Work
        Unit.

8.      Where the Parties are utilizing the same contractor, subcontractor or
        vendor and conflicts arise over availability of materials or the
        scheduling of contractors, the Parties shall cooperate with each other
        to resolve the conflict to complete the work on time.

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                                                                    CONFIDENTIAL

NETWORK PERFORMANCE

9.      Contractor will remain responsible for the performance of the
        Terrestrial Repeater Network in accordance with Article 8 of the
        Contract, but performance shall be measured against the CW test criteria
        (not MCM test criteria) and, prior to any CW test, the Site(s) being
        tested shall be reconfigured for CW transmission as mutually agreed
        between by the Parties. Contractor shall perform the CW test at Owner's
        request and expense (which pricing is set forth in paragraph 23 below).
        Contractor shall not be responsible for the impact on the performance of
        the Terrestrial Repeater Network of any Sites constructed or work
        performed by vendors contracting directly with Owner, except where Owner
        can demonstrate that the Site or work involved is fully compliant with
        Contractor's design requirements.

WORK UNITS, PRICING AND PAYMENT

10.     GENERAL. As a general principle, Contractor shall be entitled to
        Milestone Payments when Milestones are completed in accordance with the
        applicable Milestone Achievement Criteria.

11.     REVISED WORK UNITS AND PRICING. The following Work Units, Work Unit
        Achievement Criteria and pricing are hereby amended as follows:

        (A)     Work Unit RF5 (City Network Acceptance) is amended to be
                completion of MCM Testing (with one or two satellites, as
                available) for a City. The price for Work Unit RF5 is the same
                as that set forth in Section 3.1 of Exhibit C of the Contract,
                i.e., [     ] for Normal-Area Sites, [    ] for Medium-Area
                Sites and [    ] for Wide-Area Sites. Payment for Work Unit RF5
                shall be earned and paid on a per City basis; that is, for each
                City, Work Unit RF5 shall be earned upon Contractor's completion
                of  MCM Testing  (with one and/or two satellites, as available)
                in such City and shall be payable per the Contract. The price
                for reconfiguring Contractor's vans, equipment and software from
                CW testing capability to MCM testing capability will be
                determined on the basis of Default Pricing.

        (B)     The pricing for Work Units RF4, RF6 and RC7 are based on Owner
                delivering repeaters and completing construction on Sites other
                than Construction Sites in accordance with a schedule to be
                agreed to by the Parties within 7 Calendar Days after the
                Effective Date of this Amendment No. 6. The Parties acknowledge
                and agree that the minimum requirements for repeater deliveries
                are [   ] available in Pilot's regional storage facilities by
                [    ] an additional [  ] so available by [   ] an additional
                [    ] so available by [    ], and an additional [  ] so
                available by [    ]. By way of clarification, Owner's failure
                to meet such schedule shall be subject to Articles 7.4
                (Excusable Delay Defined) and  7.5 (Contract Adjustments) of
                the Contract.

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                                                                    CONFIDENTIAL

(C)     Work Unit AE2 (Construction Documents and Building Permits) is
        subdivided into two Work Units as follows. Work Unit AE2(a) shall be all
        of Work Unit AE2, excluding any work related to building permits and
        shall be called "Construction Documents." The price for Work Unit AE2(a)
        shall be [    ]. Work Unit AE2(b) shall be the filing and pulling of a
        building permit and the price therefor shall be [   ] and shall be
        called "Building Permits." In the event Owner requests corrections and
        modifications in Construction Documents prior to the 14-Calendar Day
        period specified in paragraph 3 above, such corrections and
        modifications shall be made at no charge to Owner; for corrections and
        modifications requested by Owner after such 14-Calendar Day, the price
        of such requested corrections and modifications shall be determined on
        the basis of Default Pricing. The Parties will work together
        cooperatively to minimize the cost to Owner of any required corrective
        action. In addition, the Parties acknowledge and agree that, as of the
        Effective Date of this Amendment No. 6, Contractor has filed and/or
        pulled the building permits for certain Zoning Sites. Contractor shall
        provide to Owner a list of such Sites no later than January 12, 2001.
        For such Sites as identified, Owner agrees to pay Contractor the price
        for Work Unit AE2(b).

(D)     Work Unit AE3 (Final "As Built Drawings"/Construction Documents) shall
        be earned on a per Site basis as follows: (1) for Construction Sites,
        upon delivery of completed, final "As Built" drawings in accordance with
        the Contract and (2) for Zoning Sites, upon completion of Work Unit
        AE2(a) (Construction Documents).

(E)     Work Unit AE4 (Completion of Construction) shall be earned on a per Site
        basis as follows: (1) for Construction Sites, upon resolution of punch
        list items and (2) for Site Acquisition Sites and Zoning Sites, upon
        Work Completion as defined in paragraph 6 above (excluding completion of
        MCM Testing and the Required Work for Supplemental Sites). The amount
        payable for Work Unit AE4 for a Site shall equal 11% of the total amount
        payable by Owner for other AE Work Units earned by Contractor in respect
        of such Site and shall be paid the later of achieving Work Completion
        (excluding completion of MCM Testing and the Required Work for
        Supplemental Sites) for all Sites listed in Schedule A and August 1,
        2001.

(F)     Work Unit ZN3 (City Network Acceptance) shall be earned on a per Site
        basis upon Contractor achieving Work Completion as defined in paragraph
        6 above (excluding completion of MCM Testing and the Required Work for
        Supplemental Sites) and shall be paid the later of achieving Work
        Completion (excluding completion of MCM Testing and the Required Work
        for Supplemental Sites) for all Sites listed in Schedule A and August 1,
        2001.

(G)     In the event Owner fails to make repeaters available at Pilot's storage
        facilities in the quantities described in paragraph 11(B) above, and
        Work

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                                                                    CONFIDENTIAL

        Completion is delayed for any Site beyond, [       ] then Owner shall
        pay Contractor for SC2 on all remaining Sites on or before [        ].
        The price for Work Unit SC2 (excluding Sites billed on a Cost-Plus
        basis) is increased by [     ] per Site to account for subcontractor
        return visits to all such Sites requiring return visits. The Parties
        acknowledge that any pricing quoted to date on a Cost-Plus Pricing basis
        may be increased to account for additional contractor charges resulting
        from required subcontractor return visits.

12.     PROJECT MANAGEMENT: PRICE AND PAYMENT. The Project Management Fixed
        Price Amount for Project Management Services until the later of
        achieving Work Completion (excluding completion of MCM Testing and the
        Required Work for Supplemental Sites) for all Sites and [       ] is
        amended to be [       ] and shall be earned and payable as follows:

        (A)     Work Unit M1 is amended to equal a total aggregate for all Sites
                of [       ] of the Project Management Fixed Price Amount. Work
                Unit M1 shall be earned for Project Management Services and
                shall be paid at the rate of [         ] per month (up to a cap
                of ); [       ] provided,  however, to the extent Owner has paid
                in excess of [       ] as of the Effective Date of this
                Amendment No. 6, the excess will be credited to other amounts
                payable by Owner.

        (B)     The balance of the Project Management Fixed Price Amount (i.e.,
                [       ]) shall be paid in three equal installments of [      ]
                each by August 1, 2001, September 1, 2001 and September
                25, 2001, respectively. Interest shall accrue at a rate of
                [  ] per year on the [       ] balance as follows: (i) with
                respect to Project Management Services invoiced after the
                Effective Date of this Amendment No. 6, interest shall accrue
                from the date that is 30 Calendar Days after receipt of the
                invoice; and (ii) with respect to Project Management Services
                invoiced and paid prior to the Effective Date of this Amendment
                No. 6, interest shall accrue from the date such previously paid
                amounts are credited against the payment due from Owner on
                invoices received from Contractor.

        (C)     Work Unit M2 is hereby deleted.

        (D)     Project Management Services, if requested by Owner, after the
                time period set forth above shall be provided by Contractor on
                pricing and terms to be mutually agreed by the Parties.

13.     A&E PRICE FOR HIGH-POWER SITES. The total fixed price amount for A&E
        Services for those Non-Standard Sites that are High-Power Sites shall be
        as follows: for those High-Power Sites for which Contractor has
        commenced A&E Services as of the Effective Date of this Amendment No. 6,
        the price shall be [     ] and for all other High-Power Sites, the price
        shall be [     ]. Schedule A identifies all High-Power Sites and those
        High-Power Sites for which Contractor has commenced A&E

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                                                                    CONFIDENTIAL

        Services as of the Effective Date of this Amendment No. 6. Contractor
        shall provide Owner with a list of the High-Power Sites and the
        High-Power Sites for which A&E work has been commenced within 3 Business
        Days after the Effective Date of this Amendment No. 6. This amount shall
        be earned and paid on a per Site/per Work Unit basis and the amount
        associated with each AE Work Unit for High-Power Sites shall be the
        following:

                                   [TABLE]

        * Percentages for AE2(a) & AE2(b) shall add up to 30%.

INCENTIVES FOR TIMELY DELIVERY AND TERMINATION

14.     Paragraphs (c) and (d) of Article 7.2 (Delivery Incentives and
        Liquidated Damages) of the Contract are hereby deleted and replaced by
        the following:

               "(c) For each category set forth in Table 14.1, in the event
               Contractor fails to complete the Work Units required therein (the
               "Liquidated Damages Work") in accordance with the Contract for
               the required number of Construction Sites or [  ] or more of the
               required number of Zoning Sites, respectively, within such
               category on or before the respective dates, each as set forth in
               Table 14.1 below, Contractor shall pay Owner, as liquidated
               damages and not as a penalty, the following respective
               percentages of [         ]

Amendment 6                             7

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                                                                    CONFIDENTIAL

                                  TABLE 14.1

                                   [TABLE]

* For the avoidance of doubt, for purposes of this Table 14.1, no Site that is a
Construction Site shall be counted as a Zoning Site.

               For example, if Contractor fails to achieve the Liquidated
               Damages Work for the [  ] Construction Sites required on or
               before February 15, 2001, Contractor shall pay Owner [
                                        ].

               "(d) The total amount of liquidated damages for failure to
               achieve the Liquidated Damages Work required in Table 14.1 on or
               before the respective dates set forth therein is [         ].

               "(e) For those Sites for which Contractor fails to achieve the
               Liquidated Damages Work by the respective dates set forth in
               Table 14.1 (excluding Supplemental Sites), Contractor shall have
               a continuing obligation to achieve the Liquidated Damages Work
               for such Sites as expeditiously as possible.

               "(f) Where Contractor fails to complete the Liquidated Damages
               Work for Zoning Sites by the dates required in Table 14.1,
               Contractor will not be assessed liquidated damages for that
               period of time where Owner would have been unable to commence
               construction on the shortfall Sites due to the unavailability of
               Owner's construction contractor to begin work on those Sites.
               This relief from liquidated damages will in no event extend
               beyond [        ]."

15.     By way of clarification, Articles 7.4 (Excusable Delay) and 7.5
        (Contract Adjustments) of the Contract apply to the schedule set forth
        in Table 14.1 above; provided, however, in the case of Owner's
        responsibility to review leases provided by Contractor, (1) Owner shall
        accept or reject the lease and respond to Contractor

Amendment 6                             8

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                                                                    CONFIDENTIAL

        within 5 Business Days of being provided a lease for review, (2) in the
        event Owner fails to respond to Contractor regarding a lease for a
        Zoning Site within such 5 Business Days, Contractor shall be entitled to
        an Excusable Delay for a single Zoning Site (without regard to whether
        Owner's failure adversely impacted Contractor's ability to perform the
        Work or whether the delay could have been avoided by Contractor) and (3)
        the Contract adjustment for such Excusable Delay shall be as follows:
        for each Business Day Owner is late in responding to Contractor, an
        extension of one Business Day in the schedule for a single Zoning Site
        in the [       ] category of Zoning Sitess in Table 14.1 (except in the
        case of a materially large number of Sites for which Owner is late in
        responding on submitted leases in which case the Parties will negotiate
        an equitable adjustment to the schedule in Table 14.1 for the affected
        Sites). For example, if Owner is late by 3 Business Days in responding
        to Contractor regarding a lease, then Contractor shall be permitted an
        extension of 3 Business days in achieving the Liquidated Damages Work
        for a Site in the [       ] category of Zoning Sites in Table 14.1; all
        other Sites shall remain subject to the applicable dates in Table 14.1
        for achieving the applicable Liquidated Damages Work; that is, [  ]
        Zoning Sites shall be subject to the [            ] date in Table 14.1
        and the one remaining Site shall be subject to a revised date of [
               ] ([            ] plus 3 Business Days).

16.     With respect to each category set forth in Table 14.1, in the event
        Contractor fails to achieve for the required number of Construction
        Sites or 95% of the required number of Zoning Sites for that respective
        category the applicable Liquidated Damages Work on or before 30 Calendar
        Days after the respective date set forth therein, Owner shall have the
        right to remove, at no cost to Owner, from Contractor's scope of work
        and from the applicable category (i.e., Construction or Zoning) that
        number of Sites equal to the difference between (a) the number of Sites
        for which the Liquidated Damages Work should have been completed in
        order to achieve the required number of Sites (i.e., 100% for
        Construction Sites or 95% for Zoning Sites) set forth in Table 14.1
        above, and (b) the number of Sites for which Liquidated Damages Work was
        completed. The particular individual Sites to be removed shall be
        determined by mutual agreement of the Parties. For such removed Sites,
        Contractor shall be entitled to payment of all unpaid amounts invoiced
        hereunder for Work Units completed in accordance with this Contract and
        all unpaid amounts for Work-in-progress on any Work Unit not completed
        as of the effective date of such removal, with the payment equal to the
        percentage of the applicable Work Unit price that is equal to the
        percentage of Work Unit actually completed, as determined by the
        Parties, on the applicable Work Unit.

17.     Reserved.

VENDOR INTERFACES

18.     As part of Program Management Services, Contractor shall work
        cooperatively, to a reasonable level of support (which shall not exceed
        1 Man-Month), to provide Owner with interfaces between Contractor's work
        and the work of Owner's other

Amendment 6                             9

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                                                                    CONFIDENTIAL

        construction vendors at no additional charge through the later of
        achieving Work Completion (excluding completion of MCM Testing and the
        Required Work for Supplemental Sites) for all Sites and May 15, 2001.

SUSTAINING ENGINEERING

19.     Owner hereby agrees to purchase, and Contractor hereby agrees to
        provide, during the period from May 15, 2001 through December 31, 2001,
        engineering, technical advisory support, operations and maintenance and
        other technical services in accordance with a scope of work, performance
        schedule and pricing schedule to be mutually agreed by Owner and
        Contractor, which services shall average approximately [      ] per
        month and have an aggregate value of not less than [        ], to be
        invoiced monthly commencing June 2001.

20.     Reserved.

CONTRACT ADMINISTRATION

21.     INVOICE DOCUMENTATION. From and after the date hereof, all Contractor
        invoices shall identify the Milestones and Work Units completed, and the
        prices applicable thereto, and shall be accompanied by a spreadsheet
        showing, in addition to other information, the transmittal letter number
        for each Work Unit performed after September 1, 2000 and covered in the
        invoice. Within 10 Calendar Days of the receipt of an invoice for Work
        Units performed prior to September 1, 2000 and invoiced after the
        Effective Date of this Amendment No. 6, Owner will notify Contractor of
        any required deliverables for such Work Units not submitted to Owner.
        Within 10 Calendar Days of receipt of such notice, Contractor will
        provide to Owner the missing required deliverables identified in such
        notice or proof of delivery. With regard to Work Units performed after
        September 1, 2000, an invoice shall be deemed complete if accompanied by
        a copy of (a) the signed and dated transmittal letters forwarding the
        required deliverables to Owner and (b) Owner's e-mail confirmation that
        the required deliverables have been received (which confirmation Owner
        shall promptly provide to Contractor upon receipt of deliverables). With
        regard to Work Unit SC1, Contractor shall certify completion of the Work
        Unit invoiced and Owner shall process the invoice but will not pay same
        until the required report has been delivered to Owner.

SCHEDULE A

22.     All Sites are listed on draft Schedule A, which shall be finalized by
        the Parties no later than January 10, 2001, in the form and including
        all the categories set forth in draft Schedule A. Schedule A may be
        amended (including any additions, cancellations or reclassifications of
        Sites) by the Parties only by mutual agreement pursuant to e-mail
        correspondence; provided, however, that only a Vice President of
        Contractor shall be deemed an authorized representative of Contractor
        for such purposes and only a Vice President of Owner (or as otherwise
        authorized in writing

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<PAGE>   11
                                                                    CONFIDENTIAL

        by a Vice President of Owner) shall be deemed an authorized
        representative of Owner. The Parties acknowledge that any amendments to
        Schedule A shall result in an equitable adjustment to the revised
        Baseline Schedule (also referred to in the Contract as the Initial City
        Schedule), the required number of Sites set forth in Table 14.1, and
        Contract Sum. For example, the cancellation of one (1) Construction Site
        (other than a Supplemental Site) shall reduce the required number of
        Construction Sites set forth in Table 14.1 by one (1) Site.

OPTION FOR CW TESTING

23.     At any time commencing upon the Effective Date of this Amendment No. 6
        up to and including September 30, 2001, Owner may, at its option, elect
        by written notice to Contractor to purchase from Contractor those CW
        testing services described in the Contract. The price for such services
        shall be the price for Work Unit RF5 set forth in the Contract, i.e.,
        [      ] for Normal-Area Sites, [      ] for Medium-Area Sites and
        [      ] for Wide-Area Sites provided the CW testing is conducted on a
        City-wide basis and Owner requests Contractor, within 14 Calendar Days
        of completion of MCM Testing in such City, to provide CW testing for a
        City. Otherwise, the price for CW testing shall be determined on the
        basis of Default Pricing. In addition, the price for reconfiguring vans,
        equipment and software and performing antenna repointing as necessary to
        conduct CW testing shall be determined on the basis of Default Pricing.

REVISED SCHEDULES

24.     Draft revised Baseline Schedules are set forth in Schedule B. The
        Parties agree to finalize the revised Baseline Schedules no later than
        January 12, 2001. The final revised Baseline Schedules may be amended by
        the Parties only by mutual agreement pursuant to e-mail correspondence;
        provided, however, that only a Vice President of Contractor shall be
        deemed an authorized representative of Contractor for such purposes and
        only a Vice President of Owner (or as otherwise authorized in writing by
        a Vice President of Owner) shall be deemed an authorized representative
        of Owner. Each Party waives any claim to adjustment in price or schedule
        or claim for default arising from the other Party's failure to timely
        perform its obligations under the Contract, where such failure occurred
        prior to the Effective Date of this Amendment No. 6.

IMPLEMENTING CONTRACT CHANGES

25.     Article 7.1(b) of the Contract is hereby deleted and replaced with the
        following: "Contractor shall achieve Work Completion (excluding
        completion of MCM Testing and the Required Work for Supplemental Sites)
        on or before [          ] and Contractor shall perform the Work so as to
        achieve each Key Task set forth in the revised Baseline Schedule (also
        referred to in the Contract as the Initial City Schedule) in accordance
        with the schedule set forth therein."

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                                                                    CONFIDENTIAL

26.     Article 9.2(a) of the Contract is hereby deleted and replaced with the
        following: "Subject to paragraph (b) below, risk of loss to each item of
        the Work shall pass to Owner (i) for items to be incorporated in a Site
        constructed by Contractor, upon achieving Work Completion (excluding
        completion of MCM Testing) of that Site and (ii) for all other items,
        upon delivery of such item to Owner in accordance with this Contract."

27.     Article 10.1(a) of the Contract is hereby amended so that the warranty
        provided therein shall expire [          ].

28.     Article 25.2(a) of the Contract is hereby amended as follows: in the
        second sentence of such article, delete the phrase "demonstrating that
        it can achieve Acceptance of the affected City Network by the Acceptance
        Date" and replace it with the phrase "demonstrating that it can achieve
        Work Completion (excluding completion of MCM Testing and the Required
        Work for Supplemental Sites) by [          ]".

29.     Article 25.2(b) of the Contract is hereby amended as follows: delete
        "demonstrating it can achieve Acceptance of the affected City Network in
        accordance with the Acceptance Date (as may be extended pursuant to this
        Contract)" and replace it with the phrase "demonstrating that it can
        achieve Work Completion (excluding completion of MCM Testing and the
        Required Work for Supplemental Sites) by [          ]".

30.     Article 26.2 (Termination for Contractor's Default) is hereby amended as
        follows: in paragraph (1)(a), delete " (1) failure to achieve Acceptance
        for all Cities on or before the Acceptance Date, as such date may be
        adjusted in accordance with the Contract; or" and replace it with the
        following: " (1) failure to achieve Work Completion (excluding
        completion of MCM Testing and the Required Work for Supplemental Sites)
        on or before [          ]; or".

OTHER TERMS AND CONDITIONS

31.     All other terms and conditions of the Contract shall remain in full
        force and effect without modification or amendment thereto, except as
        expressly provided in this Amendment No. 6. In addition, in the event of
        any conflict between the provisions of this Amendment No. 6 and the
        Contract in effect prior to the Effective Date of this Amendment No. 6,
        the provisions of this Amendment No. 6 shall take precedence.

IN WITNESS WHEREOF this Amendment No. 6 to the Terrestrial Repeater Network
System Contract has been executed on behalf of Owner by persons authorized to
act on Owner's behalf and has also been executed on behalf of Contractor by
persons authorized to act on Contractor's behalf.

Amendment 6                             12

<PAGE>   13
                                                                    CONFIDENTIAL

LCC INTERNATIONAL, INC.                 XM SATELLITE RADIO INC.

By:_______________________              By:_______________________

PAUL O. CHELSON                         Name:  ___________________

Vice President, Deployment Services     Title: ____________________

Date:______________________             Date:_____________________

Amendment 6                             13

--------------------------------------------------------------------------------

                                   Schedule A
                                   [        ]

--------------------------------------------------------------------------------

                                   Schedule B
                                   [        ]<PAGE>   1

                                                                  EXHIBIT 10.3

                                  CYSIVE, INC.
                          EMPLOYEE STOCK PURCHASE PLAN

<PAGE>   2

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                   PAGE
                                                                                                   ----
<S>                                                                                                <C>

1.    SHARES SUBJECT TO THE PLAN.....................................................................1

2.    ADMINISTRATION.................................................................................1

3.    INTERPRETATION.................................................................................1

4.    ELIGIBLE EMPLOYEES.............................................................................1

5.    PARTICIPATION IN THE PLAN......................................................................2

6.    PAYROLL DEDUCTIONS.............................................................................2

7.    RECORD OF PAYROLL DEDUCTIONS...................................................................2

8.    OFFERING AND PURCHASE PERIODS..................................................................2

9.    RIGHTS TO PURCHASE COMMON STOCK; PURCHASE PRICE................................................3

10.   TIMING OF PURCHASE; PURCHASE LIMITATION........................................................3

11.   ISSUANCE OF STOCK CERTIFICATES.................................................................4

12.   WITHHOLDING OF TAXES...........................................................................4

13.   ACCOUNT STATEMENTS.............................................................................4

14.   PARTICIPATION ADJUSTMENT.......................................................................4

15.   CHANGES IN ELECTIONS TO PURCHASE...............................................................5

16.   TERMINATION OF EMPLOYMENT......................................................................5

17.   RETIREMENT.....................................................................................5

18.   LAY-OFF, AUTHORIZED LEAVE OR ABSENCE OR DISABILITY.............................................6

19.   DEATH..........................................................................................6

20.   TERMINATION OF PARTICIPATION...................................................................7

21.   ASSIGNMENT.....................................................................................7

22.   APPLICATION OF FUNDS...........................................................................7

23.   NO RIGHT TO CONTINUED EMPLOYMENT...............................................................7
</TABLE>

                                      -i-

<PAGE>   3

<TABLE>
<S>                                                                                                <C>
24.   AMENDMENT OF PLAN..............................................................................8

25.   EFFECTIVE DATE; TERM AND TERMINATION OF THE PLAN...............................................8

26.   EFFECT OF CHANGES IN CAPITALIZATION............................................................8

      26.1.    Changes in Stock......................................................................8

      26.2.    Reorganization in Which the Company Is the Surviving Corporation......................9

      26.3.    Reorganization in Which the Company Is Not the Surviving Corporation or Sale of
               Assets or Stock.......................................................................9

      26.4.    Adjustments...........................................................................10

      26.5.    No Limitations on Company.............................................................10

27.   GOVERNMENTAL REGULATION........................................................................10

28.   STOCKHOLDER RIGHTS.............................................................................10

29.   RULE 16B-3.....................................................................................10

30.   PAYMENT OF PLAN EXPENSES.......................................................................10
</TABLE>

                                      -ii-
<PAGE>   4

                                  CYSIVE, INC.
                          EMPLOYEE STOCK PURCHASE PLAN

       The Board of Directors of Cysive, Inc. (the "Company") has adopted this
Employee Stock Purchase Plan (the "Plan") to enable eligible employees of the
Company and its participating Affiliates (as defined below), through payroll
deductions, to purchase shares of the Company's common stock, par value $0.01
per share (the " Common Stock"). The Plan is for the benefit of the employees of
Cysive, Inc. and any participating Affiliates. The Plan is intended to benefit
the Company by increasing the employees' interest in the Company's growth and
success and encouraging employees to remain in the employ of the Company or its
participating Affiliates. The provisions of the Plan are set forth below:

1.     SHARES SUBJECT TO THE PLAN.

       Subject to adjustment as provided in Section 26 below, the aggregate
number of shares of Common Stock that may be made available for purchase by
participating employees under the Plan is 500,000. The shares issuable under the
Plan may, in the discretion of the Board of Directors of the Company (the
"Board"), be authorized but unissued shares, treasury shares or issued and
outstanding shares that are purchased in the open market.

2.     ADMINISTRATION.

       The Plan shall be administered under the direction of the Compensation
Committee of the Board (the "Committee"). No member of the Board or the
Committee shall be liable for any action or determination made in good faith
with respect to the Plan.

3.     INTERPRETATION.

       It is intended that the Plan will meet the requirements for an "employee
stock purchase plan" under Section 423 of the Internal Revenue Code of 1986 (the
"Code"), and it is to be so applied and interpreted. Subject to the express
provisions of the Plan, the Committee shall have authority to interpret the
Plan, to prescribe, amend and rescind rules relating to it, and to make all
other determinations necessary or advisable in administering the Plan, all of
which determinations will be final and binding upon all persons.

4.     ELIGIBLE EMPLOYEES.

       Any employee of the Company and its designated Affiliates as determined
by the Board of Directors may participate in the Plan, except the following, who
are ineligible to participate: (a) an employee who has been employed by the
Company or any of its participating Affiliates for less than three months as of
the beginning of an Offering Period (as defined in Section 8 below); (b) an
employee whose customary employment is for less than five months in any calendar
year; (c) an employee whose customary

                                      -1-
<PAGE>   5

employment is 20 hours per week or less; and (d) an employee who, after
exercising his or her rights to purchase shares under the Plan, would own shares
of Common Stock (including shares that may be acquired under any outstanding
options) representing five percent or more of the total combined voting power of
all classes of stock of the Company. The term "participating Affiliate" means
any company or other trade or business that is a subsidiary of the Company
(determined in accordance with the principles of Sections 424(e) and (f) of the
Code and the regulations thereunder). The Board may at any time in its sole
discretion, if it deems it advisable to do so, terminate the participation of
the employees of a particular participating Affiliate.

5.     PARTICIPATION IN THE PLAN.

       An eligible employee may become a participating employee in the Plan by
completing an election to participate in the Plan on a form provided by the
Company and submitting that form to the Payroll Department of the Company. The
form will authorize payroll deductions (as provided in Section 6 below) and
authorize the purchase of shares of Common Stock for the employee's account in
accordance with the terms of the Plan. Enrollment will become effective upon the
first day of the first Offering Period. Enrollment in this Plan is limited to
one Offering Period at a time.

6.     PAYROLL DEDUCTIONS.

       At the time an eligible employee submits his or her election to
participate in the Plan (as provided in Section 5 above), the employee shall
elect to have deductions made from his or her pay, on each pay day following his
or her enrollment in the Plan, and for as long as he or she shall participate in
the Plan. The deductions will be credited to the participating employee's
account under the Plan. An employee may not during any Offering Period change
his or her amount or percentage of payroll deduction for that Offering Period,
nor may an employee withdraw any contributed funds, other than in accordance
with Sections 15 through 20 below.

7.     RECORD OF PAYROLL DEDUCTIONS.

       The Company and participating Affiliates will cause to be maintained a
record of amounts credited to each participating employee authorizing a payroll
deduction pursuant to Section 6. The Company will not credit interest on the
balance of the employees' accounts during the Offering Period.

8.     OFFERING AND PURCHASE PERIODS.

       The Offering Periods and Purchase Periods shall be determined by the
Committee. If at the beginning of any Offering Period, the fair market value of
Common Stock shall be less than the fair market value of Common Stock on the
first day of any prior Offering Period which has not yet terminated, all
individuals who are participating in the Plan for that prior Offering Period
shall be automatically terminated from that prior Offering Period and be deemed
to have elected to participate in the current

                                      -2-
<PAGE>   6

Offering Period. All payroll deduction forms for the prior Offering Period will
be deemed to apply to the current Offering Period.

9.     RIGHTS TO PURCHASE COMMON STOCK; PURCHASE PRICE.

       Rights to purchase shares of Common Stock will be deemed granted to
participating employees as of the first trading day of each Offering Period. The
purchase price of each share of Common Stock (the "Purchase Price") shall be set
by the Committee; provided that in no event shall the Purchase Price be less
than the lesser of 85 percent of the fair market value of the Common Stock (i)
on the first trading day of the Offering Period or (ii) on the last trading day
of the Purchase Period; provided, further, that in no event shall the Purchase
Price be less than the par value of the Common Stock. For purposes of the Plan,
"fair market value" means the value of each share of Common Stock subject to the
Plan determined as follows: if on the determination date the shares of Common
Stock are listed on an established national or regional stock exchange, are
admitted to quotation on the National Association of Securities Dealers
Automated Quotation System, or are publicly traded on an established securities
market, the fair market value of the shares of Common Stock shall be the closing
price of the shares of Common Stock on such exchange or in such market (the
highest such closing price if there is more than one such exchange or market) on
the trading day immediately preceding the determination date (or if there is no
such reported closing price, the fair market value shall be the mean between the
highest bid and lowest asked prices or between the high and low sale prices on
such trading day) or, if no sale of the shares of Common Stock is reported for
such trading day, on the next preceding day on which any sale shall have been
reported. If the shares of Common Stock are not listed on such an exchange,
quoted on such System or traded on such a market, fair market value shall be
determined by the Board in good faith.

10.    TIMING OF PURCHASE; PURCHASE LIMITATION.

       Unless a participating employee has given prior written notice
terminating such employee's participation in the Plan, or the employee's
participation in the Plan has otherwise been terminated as provided in Sections
15 through 20 below, such employee will be deemed to have exercised
automatically his or her right to purchase Common Stock on the last trading day
of the Purchase Period (except as provided in 15 below) for the number of shares
of Common Stock which the accumulated funds in the employee's account at that
time will purchase at the Purchase Price, subject to the participation
adjustment provided for in Section 14 below and subject to adjustment under
Section 26 below. Notwithstanding any other provision of the Plan, no employee
may purchase in any one calendar year under the Plan and all other "employee
stock purchase plans" of the Company and its participating Affiliates shares of
Common Stock having an aggregate fair market value in excess of $25,000,
determined as of the first trading date of the Offering Period as to shares
purchased during such period. Effective upon the last trading day of the
Purchase Period, a participating employee will become a stockholder with respect
to the shares purchased during such period, and will thereupon have all
dividend, voting and other ownership rights incident thereto. Notwithstanding
the

                                      -3-
<PAGE>   7

foregoing, no shares shall be sold pursuant to the Plan unless the Plan is
approved by the Company's stockholders in accordance with Section 25 below.

11.      ISSUANCE OF STOCK CERTIFICATES.

         As of the last trading day of the Purchase Period, a participating
employee will be credited with the number of shares of Common Stock purchased
for his or her account under the Plan during such Offering Period. Shares
purchased under the Plan will be held in the custody of an agent (the "Agent")
appointed by the Committee. The Agent may hold the shares purchased under the
Plan in stock certificates in nominee names and may commingle shares held in its
custody in a single account or stock certificate without identification as to
individual participating employees. A participating employee may, at any time
following his or her purchase of shares under the Plan, by written notice
instruct the Agent to have all or part of such shares reissued in the
participating employee's own name and have the stock certificate delivered to
the employee.

12.    WITHHOLDING OF TAXES.

       To the extent that a participating employee realizes ordinary income in
connection with a sale or other transfer of any shares of Common Stock purchased
under the Plan, the Company may withhold amounts needed to cover such taxes from
any payments otherwise due and owing to the participating employee or from
shares that would otherwise be issued to the participating employee hereunder.
Any participating employee who sells or otherwise transfers shares purchased
under the Plan within two years after the beginning of the Offering Period in
which the shares were purchased must within 30 days of such transfer notify the
Payroll Department of the Company in writing of such transfer.

13.    ACCOUNT STATEMENTS.

       The Company will cause the Agent to deliver to each participating
employee a statement for each Purchase Period during which the employee
purchases Common Stock under the Plan, but no more frequently than every six
months, reflecting the amount of payroll deductions during the Purchase Period,
the number of shares purchased for the employee's account, the price per share
of the shares purchased for the employee's account and the number of shares held
for the employee's account at the end of the Purchase Period.

14.    PARTICIPATION ADJUSTMENT.

       If in any Purchase Period the number of unsold shares that may be made
available for purchase under the Plan pursuant to Section 1 above is
insufficient to permit exercise of all rights deemed exercised by all
participating employees pursuant to Section 10 above, a participation adjustment
will be made, and the number of shares purchasable by all participating
employees will be reduced proportionately. Any funds then remaining in a
participating employee's account after such exercise will be refunded to the
employee.

                                      -4-
<PAGE>   8

15.    CHANGES IN ELECTIONS TO PURCHASE.

       (a)    A participating employee may, at any time prior to the last day of
the Purchase Period, by written notice to the Company, direct the Company to
cease payroll deductions (or, if the payment for shares is being made through
periodic cash payments, notify the Company that such payments will be
terminated), in accordance with the following alternatives:

              (i) The employee's option to purchase shall be reduced to the
number of shares which may be purchased, as of the last day of the Purchase
Period, with the amount then credited to the employee's account; or

              (ii) Withdraw the amount in such employee's account and terminate
such employee's option to purchase.

       (b)    Any participating employee may decrease his or her payroll
deduction or periodic cash payments, to take effect on the first day of the next
following payroll period by delivering to the Company a new form regarding
election to participate in the Plan under Section 5 above.

       (c)    Any participating employee may increase his or her payroll
deduction or periodic cash payments, to take effect on the first day of the next
following Offering Period by delivering to the Company a new form regarding
election to participate in the Plan under Section 5 above.

16.    TERMINATION OF EMPLOYMENT.

       In the event a participating employee voluntarily leaves the employ of
the Company or a participating Affiliate, otherwise than by retirement under a
plan of the Company or a participating Affiliate, or is terminated by the
Company prior to the last day of the Purchase Period, the amount in the
employee's account will be distributed and the employee's option to purchase
will terminate.

17.    RETIREMENT.

       In the event a participating employee who has an option to purchase
shares leaves the employ of the Company or a participating Affiliate because of
retirement under a plan of the Company or a participating Affiliate the
participating employee may elect, within 60 days after the date of such
retirement or termination, but, in no event, later than the end of the current
Purchase Period, one of the following alternatives:

       (a)    The employee's option to purchase shall be reduced to the number
of shares which may be purchased, as of the last day of the Purchase Period,
with the amount then credited to the employee's account; or

       (b)    Withdraw the amount in such employee's account and terminate such
employee's option to purchase.

                                      -5-
<PAGE>   9

       In the event the participating employee does not make an election within
the aforesaid 60-day period, he or she will be deemed to have elected subsection
17(b) above.

18.    LAY-OFF, AUTHORIZED LEAVE OR ABSENCE OR DISABILITY.

       Payroll deductions for shares for which a participating employee has an
option to purchase may be suspended during any period of absence of the employee
from work due to lay-off, authorized leave of absence or disability or, if the
employee so elects, periodic payments for such shares may continue to be made in
cash.

       If such employee returns to active service prior to the last day of the
Purchase Period, the employee's payroll deductions will be resumed and if said
employee did not make periodic cash payments during the employee's period of
absence, the employee shall, by written notice to the Company's Payroll
Department within 10 days after the employee's return to active service, but not
later than the last day of the Purchase Period, elect one of the following
alternatives:

       (a)    The employee's option to purchase shall be reduced to the number
of shares that can be purchased with the amount, if any, then credited to the
employee's account plus the aggregate amount, if any, of all payroll deductions
to be made thereafter; or

       (b)    Withdraw the amount in the employee's account and terminate the
employee's option to purchase.

       A participating employee on lay-off, authorized leave of absence or
disability on the last day of the Purchase Period shall deliver written notice
to his or her employer on or before the last day of the Purchase Period,
electing one of the alternatives provided in the foregoing clauses (a) or (b) of
this Section 18. If any employee fails to deliver such written notice within 10
days after the employee's return to active service or by the last day of the
Purchase Period, whichever is earlier, the employee shall be deemed to have
elected subsection 18(b) above.

       If the period of a participating employee's lay-off, authorized leave of
absence or disability shall terminate on or before the last day of the Purchase
Period, and the employee shall not resume active employment with the Company or
a participating Affiliate, the employee shall receive a distribution in
accordance with the provisions of Section 17 of this Plan.

19.    DEATH.

       In the event of the death of a participating employee while the
employee's option to purchase shares is in effect, the legal representatives of
such employee may, within 60 days after the employee's death (but no later than
the last day of the Purchase Period) by

                                      -6-
<PAGE>   10

written notice to the Company or participating Affiliate, elect one of the
following alternatives:

       (a)    The employee's option to purchase shall be reduced to the number
of shares which may be purchased, as of the last day of the Purchase Period,
with the amount then credited to the employee's account; or

       (b)    Withdraw the amount in such employee's account and terminate such
employee's option to purchase.

       In the event the legal representatives of such employee fail to deliver
such written notice to the Company or participating Affiliate within the
prescribed period, the election to purchase shares shall terminate and the
amount, then credited to the employee's account shall be paid to such legal
representatives.

20.    TERMINATION OF PARTICIPATION.

       A participating employee will be refunded all moneys in his or her
account, and his or her participation in the Plan will be terminated if either
(a) the Board elects to terminate the Plan as provided in Section 25 below, or
(b) the employee ceases to be eligible to participate in the Plan under Section
4 above. As soon as practicable following termination of an employee's
participation in the Plan, the Company will deliver to the employee a check
representing the amount in the employee's account and a stock certificate
representing the number of whole shares held in the employee's account. Once
terminated, participation may not be reinstated for the then current Offering
Period, but, if otherwise eligible, the employee may elect to participate in any
subsequent Offering Period.

21.    ASSIGNMENT.

       No participating employee may assign his or her rights to purchase shares
of Common Stock under the Plan, whether voluntarily, by operation of law or
otherwise. Any payment of cash or issuance of shares of Common Stock under the
Plan may be made only to the participating employee (or, in the event of the
employee's death, to the employee's estate). Once a stock certificate has been
issued to the employee or for his or her account, such certificate may be
assigned the same as any other stock certificate.

22.    APPLICATION OF FUNDS.

       All funds received or held by the Company under the Plan shall be
deposited with the Agent for the account of the participating employees.
Participating employees' accounts will not be segregated.

23.    NO RIGHT TO CONTINUED EMPLOYMENT.

       Neither the Plan nor any right to purchase Common Stock under the Plan
confers upon any employee any right to continued employment with the Company or
any of its

                                      -7-
<PAGE>   11

participating Affiliates, nor will an employee's participation in the Plan
restrict or interfere in any way with the right of the Company or any of its
participating Affiliates to terminate the employee's employment at any time.

24.    AMENDMENT OF PLAN.

       The Board may, at any time, amend the Plan in any respect (including an
increase in the percentage specified in Section 9 above used in calculating the
Purchase Price); provided, however, that without approval of the stockholders of
the Company no amendment shall be made (a) increasing the number of shares
specified in Section 1 above that may be made available for purchase under the
Plan (except as provided in Section 26 below), (b) changing the eligibility
requirements for participating in the Plan, or (c) impairing the vested rights
of participating employees.

25.    EFFECTIVE DATE; TERM AND TERMINATION OF THE PLAN.

       The Plan shall be effective as of the date of adoption by the Board,
which date is set forth below, subject to approval of the Plan by a majority of
the votes present and entitled to vote at a duly held meeting of the
shareholders of the Company at which a quorum representing a majority of all
outstanding voting stock is present, either in person or by proxy; provided,
however, that upon approval of the Plan by the shareholders of the Company as
set forth above, all rights to purchase shares granted under the Plan on or
after the effective date shall be fully effective as if the shareholders of the
Company had approved the Plan on the effective date. If the shareholders fail to
approve the Plan on or before one year after the effective date, the Plan shall
terminate, any rights to purchase shares granted hereunder shall be null and
void and of no effect and all contributed funds shall be refunded to
participating employees. The Board may terminate the Plan at any time and for
any reason or for no reason, provided that such termination shall not impair any
rights of participating employees that have vested at the time of termination.
In any event, the Plan shall, without further action of the Board, terminate ten
(10) years after the date of adoption of the Plan by the Board or, if earlier,
at such time as all shares of Common Stock that may be made available for
purchase under the Plan pursuant to Section 1 above have been issued.

26.    EFFECT OF CHANGES IN CAPITALIZATION.

       26.1.  CHANGES IN STOCK.

       If the number of outstanding shares of Common Stock is increased or
decreased or the shares of Common Stock are changed into or exchanged for a
different number or kind of shares or other securities of the Company by reason
of any recapitalization, reclassification, stock split, reverse split,
combination of shares, exchange of shares, stock dividend, or other distribution
payable in capital stock, or other increase or decrease in such shares effected
without receipt of consideration by the Company occurring after the effective
date of the Plan, the number and kinds of shares that may be purchased under the
Plan shall be adjusted proportionately and accordingly by the Company. In
addition, the number and kind of shares for which rights are outstanding

                                      -8-
<PAGE>   12

shall be similarly adjusted so that the proportionate interest of a
participating employee immediately following such event shall, to the extent
practicable, be the same as immediately prior to such event. Any such adjustment
in outstanding rights shall not change the aggregate Purchase Price payable by a
participating employee with respect to shares subject to such rights, but shall
include a corresponding proportionate adjustment in the Purchase Price per
share.

       26.2.  REORGANIZATION IN WHICH THE COMPANY IS THE SURVIVING CORPORATION.

       Subject to Section 26.3, if the Company shall be the surviving
corporation in any reorganization, merger or consolidation of the Company with
one or more other corporations, all outstanding rights under the Plan shall
pertain to and apply to the securities to which a holder of the number of shares
of Common Stock subject to such rights would have been entitled immediately
following such reorganization, merger or consolidation, with a corresponding
proportionate adjustment of the Purchase Price per share so that the aggregate
Purchase Price thereafter shall be the same as the aggregate Purchase Price of
the shares subject to such rights immediately prior to such reorganization,
merger or consolidation.

       26.3.  REORGANIZATION IN WHICH THE COMPANY IS NOT THE SURVIVING
              CORPORATION OR SALE OF ASSETS OR STOCK.

       Upon any dissolution or liquidation of the Company, or upon a merger,
consolidation or reorganization of the Company with one or more other
corporations in which the Company is not the surviving corporation, or upon a
sale of all or substantially all of the assets of the Company to another
corporation, or upon any transaction (including, without limitation, a merger or
reorganization in which the Company is the surviving corporation) approved by
the Board that results in any person or entity owning more than 80 percent of
the combined voting power of all classes of stock of the Company, the Plan and
all rights outstanding hereunder shall terminate, except to the extent provision
is made in writing in connection with such transaction for the continuation of
the Plan and/or the assumption of the rights theretofore granted, or for the
substitution for such rights of new rights covering the stock of a successor
corporation, or a parent or subsidiary thereof, with appropriate adjustments as
to the number and kinds of shares and exercise prices, in which event the Plan
and rights theretofore granted shall continue in the manner and under the terms
so provided. In the event of any such termination of the Plan, all current
Purchase Periods and Offering Periods shall be deemed to have ended on the last
trading day prior to such termination, and in accordance with Section 10 above
the rights of each participating employee then outstanding shall be deemed to be
automatically exercised on such last trading day. The Board shall send written
notice of an event that will result in such a termination to all participating
employees not later than the time at which the Company gives notice thereof to
its stockholders.

                                      -9-
<PAGE>   13

       26.4.  ADJUSTMENTS.

       Adjustments under this Section 26 related to stock or securities of the
Company shall be made by the Committee, whose determination in that respect
shall be final, binding, and conclusive.

       26.5.  NO LIMITATIONS ON COMPANY.

       The grant of a right pursuant to the Plan shall not affect or limit in
any way the right or power of the Company to make adjustments,
reclassifications, reorganizations or changes of its capital or business
structure or to merge, consolidate, dissolve or liquidate, or to sell or
transfer all or any part of its business or assets.

27.    GOVERNMENTAL REGULATION.

       The Company's obligation to issue, sell and deliver shares of Common
Stock pursuant to the Plan is subject to such approval of any governmental
authority and any national securities exchange or other market quotation system
as may be required in connection with the authorization, issuance or sale of
such shares.

28.    STOCKHOLDER RIGHTS.

       Any dividends paid on shares held by the Company for a participating
employee's account will be transmitted to the employee. The Company will deliver
to each participating employee who purchases shares of Common Stock under the
Plan, as promptly as practicable by mail or otherwise, all notices of meetings,
proxy statements, proxies and other materials distributed by the Company to its
stockholders. Any shares of Common Stock held by the Agent for an employee's
account will be voted in accordance with the employee's duly delivered and
signed proxy instructions. There will be no charge to participating employees in
connection with such notices, proxies and other materials.

29.    RULE 16B-3.

       Transactions under this Plan are intended to comply with all applicable
conditions of Rule 16b-3 or any successor provision under the Securities
Exchange Act of 1934, as amended. If any provision of the Plan or action by the
Board fails to so comply, it shall be deemed null and void to the extent
permitted by law and deemed advisable by the Board. Moreover, in the event the
Plan does not include a provision required by Rule 16b-3 to be stated herein,
such provision (other than one relating to eligibility requirements, or the
price and amount of awards) shall be deemed automatically to be incorporated by
reference into the Plan.

30.    PAYMENT OF PLAN EXPENSES.

       The Company will bear all costs of administering and carrying out the
Plan; provided however, participating employees shall bear all costs incurred
subsequent to the issuance of stock certificates pursuant to Section 11.

                                      -10-
<PAGE>   14

                                      * * *

                                      -11-
<PAGE>   15

       This Plan was duly adopted and approved by the Board of Directors of the
Company by unanimous written consent held on the 1st of September, 1999.

                                   /s/ JOHN R. LUND
                                  ----------------------------------
                                  John R. Lund
                                  Secretary of the Company

       This Plan was duly approved by the stockholders of the Company, by
written consent on the 1st of September, 1999.

                                   /s/ JOHN R. LUND
                                  -----------------------------------
                                  John R. Lund
                                  Secretary of the Company

       On April 17, 2000 the term "Offering Period" in part (ii) of Section 9 of
the Plan was changed to "Purchase Period" to reflect a ministerial correction to
the Plan pursuant to the authority granted to the Officers of the Company at the
time of the adoption of the Plan.

                                   /s/ JOHN R. LUND
                                  -----------------------------------
                                  John R. Lund
                                  Secretary of the Company

                                      -12-

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