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                                                                    EXHIBIT 4.45

                          ALLIED WASTE INDUSTRIES, INC.

                FIRST AMENDMENT TO THE 1993 INCENTIVE STOCK PLAN

      This First Amendment to the 1993 Incentive Stock Plan (the "1993 Plan") is
adopted by the Board of Directors of Allied Waste Industries, Inc., a Delaware
corporation (the "Company"), pursuant to the authority granted to the Board of
Directors in Section 16 of the 1993 Plan. Capitalized terms used shall have the
meanings set forth in the 1993 Plan. The 1993 Plan is amended as follows:

      Section 6(c)(6) is amended in its entirety to read as:

      (i) No Incentive Stock Option shall be assignable or transferable
otherwise than by will or by the laws of decent and distribution or pursuant to
a Qualified Domestic Relations Order. During the lifetime of a Participant, each
Incentive Stock Option granted to him shall be exercisable only by him.

      (ii) A Non-Qualified Stock Option shall not be assignable or otherwise
transferable except: (1) by will or by the laws of descent or distribution or
pursuant to a Qualified Domestic Relations Order; (2) without consideration to
members of a Participant's immediate family (i.e., children, grandchildren and
spouse) ("family members"); (3) without consideration to trusts for the benefit
of a Participant's family members; or (4) without consideration to partnerships
whose only partners are a Participant's family members. Each Non-Qualified Stock
Option shall be exercised during a Participant's lifetime only by a Participant
or, as applicable, a Participant's family member.<PAGE>
                                                                    EXHIBIT 4.46

                                AMENDMENT TO THE
             ALLIED WASTE INDUSTRIES, INC. 1993 INCENTIVE STOCK PLAN

      THIS AMENDMENT, made and entered into on June 20, 2000, by ALLIED WASTE
INDUSTRIES, INC., a Delaware corporation ("Employer").

                                    RECITALS:

      1.    The Employer maintains the Allied Waste Industries, Inc. 1993
            incentive Stock Plan ("Plan");

      2.    The Employer has reserved the right to amend the Plan in whole or in
            part; and

      3.    The Employer intends to amend the Plan.

      THEREFORE, the Employer hereby adopts this Amendment, as follows:

      1.    Section 2(i) is hereby amended to read as follows:

            "Disability" shall mean a Participant's "permanent and total
            disability" within the meaning of Code Section 22(e)(3).

      2.    Section 2 is hereby amended to add the following new definition:

            "Retirement" means termination of employment with the Company by a
            Participant at a time when the sum of the Participant's total whole
            years (a "whole year" means 12 calendar months) of employment with
            the Company (including whole years of employment with any business
            which was acquired by the Company) and the Participant's age is at
            least 55.

      3.    Subsections 6(e)(1) and (2) are hereby amended in their entirety to
            read as follows:

            (1)   If the employment of a Participant with the Company shall
                  terminate for any reason other than Cause, or other than as
                  the result of the Participant's Disability, death, or
                  Retirement, or other than upon the occurrence of a Change in
                  Control (with or without any termination of the Participant's
                  employment), (i) Options granted to such Participant, to the
                  extent that they were exercisable at the time of such
                  termination, shall remain exercisable until the expiration of
                  one month after such termination, on which date they shall
                  expire, and (ii) Options granted to such Participant, to the
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                  extent that they were not exercisable at the time of such
                  termination, shall expire at the close of business on the date
                  of such termination; provided, however, that no Option shall
                  be exercisable after the expiration of its term.

            (2)   If the employment of a Participant with the Company shall
                  terminate as the result of the Participant's Disability,
                  death, or Retirement, all of the Options granted to such
                  Participant shall become fully and immediately exercisable
                  and shall remain exercisable until the expiration of one year
                  after such termination or, if earlier, until the expiration of
                  their term(s), on which date they shall expire.

      4.    Section 6(e) is hereby amended by adding the following new
            paragraph:

            (4)   Upon the occurrence of a Change in Control, all of the Options
                  granted to such Participant shall become fully and immediately
                  exercisable and shall remain exercisable until their
                  expiration, termination, or cancellation.

      5.    Subsection 6(f) is hereby deleted in its entirety.

      6.    The Effective Date of this Amendment shall be June 28, 2000.

      7.    Except as amended, all of the terms and conditions of the Plan shall
            remain in full force and effect.

                                            ALLIED WASTE INDUSTRIES, INC.,
                                            a Delaware corporation

                                            By /s/ Steven M. Helm
                                               --------------------------------
                                               Steven M. Helm, Vice President<PAGE>
                                                                    EXHIBIT 10.1

                                 March 20, 2002

Robert C. Fitting
Chief Executive Officer
3138 East Elwood Street
Phoenix, AZ  85034

         Re:      Your Change in Control Agreement

Dear Bob:

         Upon execution by you, this letter will constitute your Change in
Control Agreement ("Agreement") with Radyne ComStream Corp., (the "Company").

1.       Term. This Agreement will become effective March 14, 2002 and will
         terminate when you terminate your employment with the Company.

2.       Termination in Connection with a Change in Control. In the event of a
         Change of Control (as defined in the Company's Long-Term Incentive
         Plan, a copy of which definition is attached), you will be entitled to
         receive the following:

         (a)      Immediately prior to the effective date of a Change of
                  Control, all stock options granted to you and not otherwise
                  vested shall vest and become exercisable by you for a minimum
                  of 90 days (or, if longer, the term of the options thereof) so
                  that you may participate in the Change of Control transaction
                  to the fullest extent feasible, provided, however, that if the
                  acceleration of your options would cause a charge to the
                  Company's earnings, then at the Company's option it may offer
                  you a consulting position for the term of your options during
                  which your options would continue to vest;

         (b)      Upon any termination of your employment after a Change of
                  Control, for a period of eighteen months from the date of your
                  termination, the Company will pay for the COBRA benefits due
                  you;

         (c)      Upon a Change in Control, you shall be paid in a lump sum an
                  amount equal to three times your current salary from the
                  Company;

         (d)      To the extent that the benefits provided to you upon a Change
                  in Control would exceed the amount deductible pursuant to
                  Section 280G of the Internal Revenue Code (or any successor
                  law), or the rules and regulations thereunder, and thereby
                  result in an excise tax payable by you, then at least 30 days
                  prior to the due date of any such tax, the Company shall pay
                  you an amount equal the tax (together with any tax on such
                  payment).
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3.       Covenant Not to Compete.

         (a)      For a period of 1 year from any termination of your
         employment, (or, if later, upon conclusion of your service as a
         consultant), you shall not, directly or indirectly, for your own
         benefit or for, with or through any other individual, firm,
         corporation, partnership or other entity, whether acting in an
         individual, fiduciary or other capacity, own, manage, operate, control,
         advise, invest in (except as a 1% or less shareholder of a public
         company), loan money to, or participate or assist in the ownership,
         management, operation or control of or be associated as a director,
         officer, employee, partner, consultant, advisor, creditor, agent,
         independent contractor or otherwise with, or acquiesce in the use of
         your name by, any business enterprise that is in direct competition
         with the Company or any subsidiary within the United States of America
         or any other country that the Company conducts business at the time of
         your termination.

         (b)      In addition to the foregoing, at all times during the period
         of your employment and for 1 year after any termination thereof (or, if
         later, upon conclusion of your services as a consultant), you will not,
         directly or indirectly (as described above), for your benefit or for,
         with or through any business, hire, employ, solicit, or otherwise
         encourage or entice any of the Company's (or subsidiary's) employees or
         consultants to leave or terminate their employment with the Company.

         (c)      You and the Company consider the restrictions contained in
         subparagraphs (a) and (b) above to be reasonable for the purpose of
         preserving the Company's proprietary rights and interests. If a court
         makes a final judicial determination that any such restrictions are
         unreasonable or otherwise unenforceable against you, you and the
         Company hereby authorize such court to amend this Agreement so as to
         produce the broadest, legally enforceable agreement, and for this
         purpose the restrictions on time period, geographical area and scope of
         activities set forth in subparagraphs (a) and (b) above are divisible;
         if the court refuses to do so, you and the Company hereto agree to
         modify the provisions held to be unenforceable to preserve each party's
         anticipated benefits thereunder to the maximum extent legal.

         (d)      You acknowledge and agree that the Company's remedies at law
         for breach or threatened breach of any of the provisions of this
         Paragraph would be inadequate. Therefore, you agree that in the event
         of a breach or threatened breach by you of the provisions in this
         Paragraph, the Company shall be entitled to, in addition to its
         remedies at law and without posting any bond, equitable relief in the
         form of specific performance, a temporary restraining order, a
         temporary or permanent injunction, or any other equitable remedy that
         may then be available.

4.       Personal Rights and Obligations. This Agreement and all rights and
         obligations hereunder are personal and shall not be assignable by
         either you or the Company except as provided in this subparagraph, and
         any purported assignment in violation thereof shall be null and void.
         Any person, firm or corporation succeeding to the business of the
         Company by merger, consolidation, purchase of assets or otherwise,
         shall assume by contract or operation of law the obligations of the
         Company hereunder and in such a case

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         you shall continue to honor this Agreement with such business
         substituted for the Company as the employer.

5.       Notices. Any notice, election or communication to be given under this
         Agreement shall be in writing and delivered in person or deposited,
         certified or registered, in the United States mail, postage prepaid,
         addressed as follows:

         If to the Company:         Radyne ComStream Corp.
                                    3138 East Elwood Street
                                    Phoenix, Arizona 85034
                                    Attn:  Chief Executive Officer

         If to you:                 Robert C. Fitting
                                    c/o Radyne ComStream Corp.
                                    3138 East Elwood Street
                                    Phoenix, AZ  85034

         or to such other addresses as the Company or you may from time to time
         designate by notice hereunder. Notices will be effective upon delivery
         in person or upon receipt of any facsimile or e-mail, or at midnight on
         the fourth business day after the date of mailing, if mailed.

6.       Entire Agreement. Except for any confidentiality agreement, option
         grants or Company plans or policies, to which you are subject, this
         Agreement constitutes and embodies the full and complete understanding
         and agreement of the Company and you with respect to your employment by
         the Company and supersedes all prior understandings or agreements
         whether oral or in writing. This Agreement may be amended only by a
         writing signed by you and the Company. This Agreement may be executed
         in any number of counterparts, each of which will be considered a
         duplicate original.

7.       Binding Nature of Agreement. This Agreement shall be binding upon and
         inure to the benefit of the Company and its successors and assigns and
         shall be binding upon you, your heirs and legal representatives.

8.       Arbitration. Any controversy relating to this Agreement or relating to
         the breach hereof shall be settled by arbitration conducted in Phoenix,
         Arizona in accordance with the Commercial Arbitration Rules of the
         American Arbitration Association then in effect. The award rendered by
         the arbitrator(s) shall be final and judgment upon the award rendered
         by the arbitrator(s) may be entered upon it in any court having
         jurisdiction thereof. The arbitrator(s) shall possess the powers to
         issue mandatory orders and restraining orders in connection with such
         arbitration. The expenses of the arbitration shall be borne by the
         losing party unless otherwise allocated by the arbitrator(s). This
         agreement to arbitrate shall be specifically enforceable under the
         prevailing arbitration law. During the continuance of any arbitration
         proceedings, the parties shall continue to perform their respective
         obligations under this Agreement. Nothing in this Agreement shall
         preclude the Company or any affiliate or successor from seeking
         equitable relief, including injunction or specific performance, in any
         court having jurisdiction, in

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         connection with the non-compete provisions herein and any obligations
         of confidentiality.

9.       Governing Law. This Agreement shall be governed by and interpreted in
         accordance with the laws of the State of Arizona.

10.      Withholding and Release. You acknowledge and agree that payments made
         to you hereunder may be subject to taxes and withholding. You further
         acknowledge and agree that payment of any of the benefits to be
         provided to you under this Agreement following any termination of your
         employment is subject to:

         (a)      your compliance with your agreements hereunder, including in
         particular the non-competition provisions of Paragraph 3,

         (b)      any reasonable and lawful policies or procedures of the
         Company relating to employee severances; and

         (c)      the execution and delivery by you of a release reasonably
         satisfactory to the Company of any and all claims that you may have
         against the Company or related persons, except for (i) the continuing
         obligations provided herein, and (ii) for any continuing obligations of
         indemnification due you as an officer or director (or a former officer
         or director).

                                             Very truly yours,

                                             ------------------------
                                             Ming Seong Lim
                                             Chairman of the Board

ACCEPTED:

------------------------------
Robert C. Fitting

Date:
     -------------------------

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                                   DEFINITIONS

"Cause" means in the event that you, in the reasonable judgment of the Board:

         (1)      materially breach this Agreement;

         (2)      fail to follow any reasonable and lawful direction of the
Board of Directions of the Company or materially violate any reasonable rule or
regulation established by the Company from time to time regarding conduct of its
business;

         (3)      engage in any act of dishonesty with respect to the Company;

         (4)      engage in criminal conduct (whether related to or not related
to your employment); or

         (5)      fail to perform your duties satisfactorily.

"Change of Control" means any of the following:

         (1)      any merger of the Company in which the Company is not the
continuing or surviving entity, or pursuant to which Stock would be converted
into cash, securities, or other property other than a merger of the Company in
which the holders of the Company's Stock immediately prior to the merger have
the same proportionate ownership of beneficial interest of common stock or other
voting securities of the surviving entity immediately after the merger;

         (2)      any sale, lease, exchange or other transfer (in one
transaction or a series of related transactions) of assets or earning power
aggregating more than 50% of the assets or earning power of the Company and its
subsidiaries (taken as a whole), other than pursuant to a sale-leaseback,
structured finance or other form of financing transaction;

         (3)      the shareholders of the Company approve any plan or proposal
for liquidation or dissolution of the Company;

         (4)      any person (as such term is used in Section 13(d) and 14(d)(2)
of the Exchange Act), other than any current shareholder of the Company or
affiliate thereof or any employee benefit plan of the Company or any subsidiary
of the Company or any entity holding shares of capital stock of the Company for
or pursuant to the terms of any such employee benefit plan in its role as an
agent or trustee for such plan, shall become the beneficial owner (within the
meaning of Rule 13d-3 under the Exchange Act) of 50% or more of the Company's
outstanding Stock; or

         (5)      during any two-year period, individuals who at the beginning
of such period do not constitute a majority of the Board at the end of that
period, excluding any new director approved by a vote of at least two-thirds of
the directors who were directors at the beginning of the period.

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