Document:

SUBLEASE AGREEMENT

SUB-SUB-LEASE AGREEMENT

           
THIS SUB-SUB-LEASE AGREEMENT (“Sub-Sub-Lease”) is
entered into as of this 2nd day of August, 2002,
by and between The Titan Corporation, a Delaware corporation
(“Sublandlord”), and SureBeam Corporation, a
Delaware corporation (“Subtenant”).

RECITALS

A.       
Sublandlordis the tenant under that certain Sub-Lease by and
between CLOVERLEAF COLD STORAGE CO., an Iowa corporation, as
landlord (“Master Landlord”), and Sublandlord, as
tenant, dated September 1, 1999, as amended by the First
Amendment dated February 1, 2001(such
lease, as it may be amended from time to time, the
“Sub-Lease”), for certain space located at 2640
Murray Street, Sioux City, Iowa (the
“Premises”).

B.        
Subtenant wishes to Sub-Sub-Lease a portion
of the Premises from Sublandlord.

           
Now, therefore, for good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, the parties
hereby agree as follows:

1.        
Basic Sub-Sub-Lease Information.

The information set forth
in this Section (the “Basic Sub-Sub-Lease Information”)
is intended to supplement and/or summarize the provisions set forth
in the balance of this Sub-Sub-Lease.  Each reference in this
Sub-Sub-Lease to any of the terms set forth below shall mean the
respective information set forth next to such term as amplified,
construed or supplemented by the particular Section(s) of the Sub-Sub-Lease pertaining to such
information.  In the event of a conflict between the
provisions of this Section and the balance of the Sub-Sub-Lease,
the balance of the Sub-Sub-Lease shall control.

	
Sublandlord:

	
The Titan Corporation, a
Delaware corporation

		
	
Sublandlord’s
Address

 for Notices:

	
The Titan
Corporation

3033 Science Park
Road

San Diego, CA
92122

Attn: Real
Estate

(858) 552 -
9500

		
	
Subtenant:

	
                       
SureBeam Corporation, a
Delaware corporation

		
	
Subtenant’s Address

 for Notices:

	
                       
SureBeam Corporation

9276 Scranton
Road

Suite
600

San Diego, CA
92121

Attn: Jerry
Nelson

(858)
795-6234

		
	
Premises:

	
Approximately 19,400
rentable square feet, as described on Exhibit A.

		
	
Building:

	
2640 Murray Street, Sioux
City, Iowa

		
	
Permitted
Use:

	
As specified in Article 3
of the Sub-Lease for food processing, including irradiation,
offices, dock and related activities.

		
	
Basic
Rental:

	
Twenty-seven Thousand,
Five Hundred, Sixty Dollars and Zero Cents ($27,560.00) per
month (except for any partial month during the term of this
Sub-Sub-Lease, in which case Basic Rental for such month shall be
pro-rated based on the number of days in that month), escalating by
the CPI as set forth in Article 4 A. of the Sub-Lease on February
1, 2003 and on each anniversary thereof.

		
	
Special Buildout
Rental:

	
Twenty-four Thousand, Five
Hundred, Eighty-two Dollars and Zero Cents ($24,582.00) per
month pursuant to the provisions as set forth in Section 4. B. of
the First Amendment to the Sub-Lease.

		
	
Monthly Base Charge
(Refrigeration):

	
Six Thousand, Four
Hundred, Ninety Dollars and Zero Cents ($6,490.00) per month
pursuant to the provisions as set forth in Section 8. B. and
Exhibit B of the Sub-Lease.

		
	
Commencement
Date:

	
The term of the
Sub-Sub-Lease shall commence on August
2, 2002 

		
	
Expiration
Date:

	
The Expiration Date shall be January 31, 2010, or
such earlier date, if any, on which the Sub-Lease is terminated or
expires or this Sub-Sub-Lease is terminated pursuant to the terms
herein.

		
	
Subtenant’s
Insurance:

	
Specified and as required
in Article 15 of the Sub-Lease.

		
	
Security
Deposit:

	
Fifty-eight Thousand, Six
Hundred, Thirty-two Dollars and Zero Cents ($58,632.00) payable in
accordance with Section 14 hereof.

2.        
Sub-Sub-Lease.

Sublandlord hereby Sub-Sub-Leases to Subtenant, and
Subtenanthereby
Sub-Sub-Leases from Sublandlord, the Subdemised Premises upon all of the
terms, covenants and conditions in this Sub-Sub-Lease.

3.        
Delivery Condition.

Subtenant acknowledges that it takes possession of the Subdemised Premises in its “as
is” condition, and further acknowledges that Sublandlordhas made no representations or warranties of any
kind or nature, whether express or implied, with respect to the
Subdemised Premises, the remainder of the Premises, the common
areas, or the Building, nor has Sublandlord agreed to undertake or perform any modifications,
alterations, or improvements to the Subdemised Premises, the
remainder of the Premises, the common areas or the Building which
would inure to Subtenant’s benefit. 

           
4.        
Term.

4.1      
Term.  The term (the “Term”) of this
Sub-Sub-Leaseshall commence on the Commencement Date, and
shall end on the Expiration Date. 

4.2      
Surrender.  Subtenant shall, on or before the Expiration
Date, remove all personal property, furniture, trade fixtures and
other equipment,provided that the
removal of the same does not adversely affect the
Building structure or any Building operating system or is not
prohibited by the Sub-Lease, and that Subtenantpromptly repairs any damage to the Building
structure or its operating systems caused by such removal pursuant
to the requirements of the Sub-Lease.  In the event that
Subtenantfails to remove any such items as
required by this Section 4.2 by the Expiration Date, all such items
remaining on the Subdemised Premises after the Expiration Date
shall be deemed abandoned and Sublandlordmay dispose of
such items as it sees fit, without liability to
Subtenant.  Subtenant shall also be
responsible for the removal, on or before the Expiration Date, of
all alterations as required under the Sub-Lease installed by
Subtenant pursuant to this Sub-Sub-Lease and shall be responsible
for any associated repair or restoration of the Subdemised Premises
required under the Sub-Lease.  In all other respects, Subtenant shall deliver the Subdemised
Premises broom clean, in its condition as of the Commencement Date,
reasonable wear and tear and casualty excepted.  In no event
shall Subtenantremove any of the plumbing,
electrical, data lines, and HVAC system(s), except as otherwise
required pursuant to this Section 4.2.

Subtenant shall vacate and deliver possession
of the Subdemised Premises free of all liens, charges or
encumbrances resulting from any act or omission on
Subtenant’spart, and free and clear of
any and all violations of any law, rule or regulation of any
federal, state, municipal or other agency or authority by reason of
Subtenant’s
actions or failures to fulfill any of its obligations under this
Sub-Sub-Lease (“Violations”).  Subtenantshall indemnify Sublandlord against any and all loss, expense, damage, costs or
attorneys’ fees arising out of Violations
occurring any time on or after the Commencement Date.  The
voluntary or other surrender of this Sub-Sub-Lease by Subtenant,or a mutual cancellation
thereof, shall not automatically terminate any sub-Sub-Sub-Leases
or sub-subtenancies or other agreements by which Subtenant has
granted rights to third parties to all or any part of the
Subdemised Premises, but shall, at the option of Sublandlord,either (1) terminate all or any existing
Sub-Sub-Sub-Leases or sub-subtenancies or such other agreements, or (2) operate as an assignment to Sublandlordof any or all such Sub-Sub-Sub-Leases or
sub-subtenancies or such other agreements.

4.3      
Holding Over. 
If Subtenant remains in possession of the Subdemised Premises after
the Expiration Date, such occupancy shall constitute a tenancy at
sufferance, and Subtenantshall be
obligated to pay 300% of the rental installments as specified in
Section 5 of this Sub-Sub-Lease and Subtenantshall be
liable to Sublandlordfor any and all claims, damages, liabilities, costs and
expenses (including attorneys’ fees and expenses) incurred by
Sublandlordand arising out of Subtenant’s failure to timely surrender the Subdemised Premises in
accordance with the requirements of this Sub-Sub-Lease, including,
without limitation those incurred by Sublandlord arising under the
Sub-Lease.

5.        
Rent.

As used in this
Sub-Sub-Lease, the term “Rent” shall include (1) Basic
Rental and (2) all other amounts which
Subtenantis obligated to pay under the terms
of this Sub-Sub-Lease.

5.1      
Rent.  Basic Rental is as specified
in Section 1 (Basic Sub-Sub-Lease Information).  Basic Rental
shall be paid by Subtenant to the Master Landlord for the
Sublandlord as set forth in Sections 4 A., 4. B, 8. B. and Exhibit
B of the Sub-Lease and as subsequently amended or
modified.

           
Subtenantshall also be solely responsible for
any and all increases in Rent or any added cost or charge which has
arisen solely because of Subtenant’s tenancy in the Subdemised Premises, including,
without limitation, any and all heat, water and sewer charges,
electric and other utility charges, as well as any other service
charges required by the Sub-Lease and relating to the Subdemised
Premises and/or Subtenant’s occupation thereof that are not
already then covered by the Basic Rental (as defined in the
Sub-Lease), Operating Expenses (as defined in the Sub-Lease) or Tax
Expenses (as defined in the Sub-Lease) passed through to
Sublandlord under the Sub-Lease.

                       
5.2       [INTENTIONALLY
OMITTED]

5.3       Manner
of Payment.  All Rent or other payment due from Subtenant
to Sublandlord hereunder shall be paid in lawful money of the
United States, without any prior demand therefor and without any
deduction or setoff whatsoever, at the Master Landlord’s
address pursuant to Section 4. A. or such other place as
Sublandlord shall from time to time designate (including, without
limitation, by wire transfer of immediately available funds to an
account specified by Sublandlord) by written notice provided to
Subtenant at least five (5) days prior to the date on which such
Rent or other amount first becomes payable.

           
6.        
Use and Compliance With
Laws.

Subtenantshall use
the Subdemised Premises for the Permitted Use (as specified in the
Basic Sub-Sub-Lease Information) during the Term of this
Sub-Sub-Lease, and for no other use or uses.  
Subtenantshall
not engage in any activities prohibited by the
Sub-Lease.  Subtenant shall not use or store flammable or
hazardous materials on the Subdemised Premises, except to the
extent normally used in the ordinary course of business with
respect to the Permitted Use unless such materials are specifically
prohibited in the Sub-Lease.  Subtenant shall not perform any
act or carry on any practice which may injure the Subdemised
Premises or cause any offensive odors or noises that constitute a
nuisance or menace to any other tenant or tenants of the Building
or the Premises or other persons, and in no event shall any noises
or odors be emitted from the Subdemised Premises.  Nothing
shall be done upon or about the Subdemised Premises which shall be
unlawful, improper, or contrary to any law, ordinance, regulation
or requirement of any public authority or insurance inspection or
rating bureau or similar organization having jurisdiction and
Subtenant shall be in compliance at all times with all such laws,
ordinances, regulations and requirements.  Subtenant shall
observe and comply with, and shall cause its employees, agents and
invitees to observe and comply with the restrictions set forth in
this Sub-Sub-Lease.  Subtenant agrees to comply with all rules
and regulations that Master Landlord has made or may hereafter from
time to time make for the Building and/or the Premises. 
Sublandlord shall not be liable to Subtenant or any party claiming
through Subtenant in any way for damage caused by the failure of
any of the other tenants of the Building to comply with such
similar or other covenants in their leases or of such rules and
regulations.

           
7.        
Insurance.

                       
Subtenant shall
obtain at its sole expense the insurance required under Article 15
of the Sub-Lease effective as of the Commencement Date. 
Additionally, Subtenantshall
name Sublandlord and Master Landlord as
additional insureds, in their capacity as Master Landlord and
Sublandlord, and shall furnish Sublandlordon or before the Commencement Date with
certificates of insurance from its insurer, with respect to such
insurance, which certificates shall state that such insurance shall
not be cancelled unless thirty (30) days prior written notice shall
have been given to Master Landlord and Sublandlord.

           
8.
        Assignment and
Subletting.

                       
Subtenant shall not directly
or indirectly, voluntarily or by operation of law, sell, assign,
encumber, pledge or otherwise transfer or hypothecate any of its
interest in or rights with respect to the Subdemised Premises or
Subtenant’s
leaseholdestate
hereunder (collectively, “Assignment”),
or permit all or any portion of the Subdemised Premises to be
occupied by anyone (whether pursuant to a license, concession or
otherwise) other than Subtenant or sublet all or any portion of the
Subdemised Premises, without the prior written consent of Master
Landlord and Sublandlord. 

           
9.        
Alterations.

                       
Subtenant shall not make or
suffer to be made any alterations, additions or improvements to the
Subdemised Premises, including, without limitation, those related
to electrical cabling and/or systems, plumbing, data cabling, HVAC
systems, or modifications to existing finishes, without the prior
written consent of Master Landlord, as required under the
Sub-Lease, and of Sublandlord.  Additionally, Subtenant shall be subject to the
standards for repairs and alterations set forth in the
Sub-Lease.

           
10.       Repairs and
Maintenance.

10.1    
Subtenant’s Responsibility.  Subtenantshall be responsible for the
maintenance and repair of the Subdemised Premises in accordance
with the provisions of the Sub-Lease.

10.2    
Sublandlord’s Responsibility. 
As between the parties to this Sub-Sub-Lease, Sublandlordshall have no responsibility or liability to the
Subtenant or anyone claiming through Subtenant, for the Subdemised
Premises including, without limitation, the roof, roof covering,
foundation, subfloors, building structural
components, major building systems (plumbing, electrical and
heating, air conditioning and ventilation systems), and exterior
walls of the Subdemised Premises. 

           
11.      
Default.

Subtenant shall be subject to the same default
provisions as specified in Article 19 of the Sub-Lease as if it
were the tenant thereunder, and Sublandlordshall have all the remedies specified therein, as
if it were Master Landlord, including, without limitation, the
right to terminate the Sub-Sub-Lease and right to perform
Subtenant’s obligations under this
Sub-Sub-Lease at Subtenant’s cost.  Notwithstanding the
foregoing, Subtenant shall only be entitled to one-half (1/2) of
the cure period for a default, if any, provided for under the
Sub-Lease.

           
12.      
Indemnity.

                       
In addition to such indemnities as may be provided for in the
Sub-Lease, Subtenant agrees to indemnify and hold Sublandlord and
its affiliates, officers, agents, servants, employees and
independent contractors (individually a “Sublandlord
Party” and collectively, “Sublandlord Parties”)
harmless against all loss, damage, liability, or expense suffered
or claimed against any Sublandlord Party, by any person or entity
(i) caused by or otherwise arising from, in whole or in part, any
breach or default by Subtenant of any covenant or obligation it has
hereunder (including but not limited to all covenants or
obligations of the tenant under the Sub-Lease assumed by Subtenant
pursuant to the terms of this Sub-Sub-Lease), or (ii) caused by or
in connection with anything owned or controlled by Subtenant, or
(iii) resulting from any act, failure to act, or negligence of
Subtenant or its employees, agents or invitees, or (iv) resulting
from any nuisance suffered on the Subdemised Premises, except for
damage or injury to third parties or property resulting from the
proven gross negligence of Sublandlord, Landlord or their
respective employees, agents, representatives, successors or
assigns.  Subtenant further agrees to indemnify Sublandlord
and hold Sublandlord harmless from all losses, damages, liabilities
and expenses which Sublandlord may incur, or for which Sublandlord
may be liable to Master Landlord, arising from the acts or
omissions of Subtenant which are or are alleged to be defaults of
Sublandlord under the Sub-Lease or are the subject matter of any
indemnity or hold harmless of Sublandlord, as tenant, to Master
Landlord under the Sub-Lease.  The obligations of Subtenant to
indemnify Sublandlord and/or the Sublandlord Parties and/or hold
the Sublandlord and/or the Sublandlord Parties harmless in this
Section 12 and elsewhere herein shall survive the expiration or
other termination of this Sub-Sub-Lease.

           
13.      
Sub-Lease.

           
13.1     Sub-Lease.  Notwithstanding
anything in this Sub-Sub-Lease to the contrary, the rights of
Subtenant shall be subject
to and limited by the terms and conditions contained in the
Sub-Lease between Sublandlord and Master Landlord as applicable to
tenant thereunder, as they may be amended from time to time.   Sublandlordshall have the right to amend
the Sub-Lease from time to time without the consent of Subtenantprovided that any such amendment shall not
adversely affect Subtenant’sability to continue its
then current operations in the Subdemised Premises, increase any of
the rental or other payments required to be made by Subtenanthereunder or otherwise materially and
adversely change Subtenant’s rights and obligations
hereunder.  Sublandlordshall endeavor to give
Subtenantnotice of any amendment to the
Sub-Lease, but the failure to give such notice shall not affect the
validity of such amendment or its applicability to Subtenant, except that Subtenant shall
have no obligation to comply with the terms of any such amendment
until it has received a copy.  
Any rights granted to Subtenant herein which are limited by the
Sub-Lease shall be deemed to be so limited by this
Sub-Sub-Lease.

                       
13.2     No Violation. 
Notwithstanding anything in this Sub-Sub-Lease to the contrary, Subtenant shall not commit or
permit to be committed any act or omission which shall violate any
term or condition of the Sub-Lease.  Subtenant shall indemnify
and hold harmless Sublandlord from and against any loss, liability,
claim, cost or expense (including reasonable attorneys’ fees)
incurred by Sublandlord as a result of any termination or attempted
termination by Sublandlord or Master Landlord of the Sub-Lease
resulting from any such act or omission by Subtenant.

           
13.3      
[INTENTIONALLY OMITTED]

           
13.4     Termination of Sub-Lease.  If the Sub-Lease terminates for any
reason prior to the expiration or other termination of this
Sub-Sub-Lease, this Sub-Sub-Lease shall terminate concurrently
therewith without any liability of Sublandlord to Subtenant and, except for any Subtenant
obligations hereunder arising on or prior to the termination of
this Sub-Sub-Lease, following Subtenant’s surrender in
compliance with Section 4.2 hereof, Subtenant’s obligations
hereunder shall terminate, except with respect to any
indemnification or hold harmless obligations of Subtenant, which
shall survive such termination.

           
13.5     Incorporation of Sub-Lease.  Notwithstanding any other provision of this
Sub-Sub-Lease to the contrary, this Sub-Sub-Lease and Subtenant's
rights under this Sub-Sub-Lease shall at all times be subject to
all of the terms, covenants, and conditions of the Sub-Lease (a
copy of which agreement, as currently in effect, Subtenant hereby
represents that it has received), with the same force and effect as
if fully set forth herein, and except as otherwise expressly
provided for herein, Subtenant shall keep, observe and perform or
cause to be kept, observed and performed, faithfully all those
terms, covenants and conditions of Sublandlord as tenant under the
Sub-Lease with respect to the Subdemised Premises.  Except as
otherwise provided hereby, the terms, conditions, rights and
responsibilities of the Sub-Lease are incorporated herein by
reference, and Sublandlord shall have the rights
and responsibilities with respect to the Subtenantthat the
Master Landlord has with respect to Sublandlord
pursuant to the Sub-Lease, and Subtenantshall have the rights and responsibilities
with respect to Sublandlordthat Sublandlordhas with respect to the Master Landlord pursuant to
the Sub-Lease.  However, to the extent that the Sub-Lease
requires or obligates Master Landlord to maintain, repair, restore,
or otherwise expend any money or take any action to preserve and
maintain all or any portion of the Subdemised Premises or to
furnish any services to the Subdemised Premises, such obligation
shall not pass to Sublandlord by reason of this Sub-Sub-Lease and
shall remain with the Master Landlord.  Subject to the first
sentence of this Section 13.5, with respect to the relationship
between the Sublandlord and the Subtenant, the terms, covenants and
conditions of this Sub-Sub-Lease shall control with respect to any
conflict or inconsistency between the terms, covenants and
conditions contained herein and the terms, covenants and conditions
of the Sub-Lease.  Notwithstanding the foregoing, the
following sections of the Sub-Lease are hereby excluded from
application to or incorporation within this Sub-Sub-Lease: 
Sections 2. B. of the FIRST AMENDMENT TO SUB-LEASE AGREEMENT
dated February 1, 2001, and 5. A. B. & C of the original
Sub-Lease document dated September 1, 1999. 

14.      
Security Deposit / Initial Monies.

                       
Upon Subtenant’s execution and delivery of this Sub-Sub-Lease
to Sublandlord, Subtenant shall issue a check accompanying
Subtenant executed Sub-Sub-Lease payable to Sublandlord in the sum
of Fifty-eight Thousand, Six Hundred, Thirty-Two Dollars and Zero
Cents ($58,632.00), for the performance by Subtenant of the
provisions of this Sub-Sub-Lease (the “Security
Deposit”).  Sublandlord shall have the right but not the
obligation to use the Security Deposit, or any portion thereof, to
cure any breach or default of Subtenant or to compensate
Sublandlord for damages sustained as a result of any breach or
default by Subtenant hereunder.  In the event Sublandlord in
its sole discretion so utilizes all or a portion of the Security
Deposit from time to time, Subtenant shall within five (5) days of
notice from Sublandlord restore the Security Deposit to its
original amount.  If no breach or default of Subtenant exists
and no amounts are owing from Subtenant to Sublandlord as of the
expiration of the Term, Sublandlord shall return any Security
Deposit then held by Sublandlord to Subtenant within sixty (60)
days of such expiration.

15.      
Brokers.

                       
Subtenant represents that it has dealt
with no broker or agent in connection with this Sub-Sub-Lease and
Subtenant shall hold Sublandlord harmless from any and all
liability, loss, damage, expense, claim action, demand, suit or
obligation arising out of or relating to a breach by Subtenant of
such representation.

16.      
Counterparts.

                       
This Sub-Sub-Lease may be executed in one or more counterparts,
each of which shall constitute one and the same
instrument.

17.      
Governing Law.

                       
This Sub-Sub-Lease shall be governed by and construed and enforced
in accordance with the laws of the State of Iowa, except with
respect to the choice-of-law provisions thereof.

18.      
Waivers; Amendments.

                       
No failure or delay by any party hereto in exercising any right,
power or privilege hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise thereof preclude any other or
further exercise thereof or the exercise of any other right, power
or privilege. The rights and remedies provided herein shall be
cumulative and not exclusive of any rights or remedies provided by
law. Any provision of this Sub-Sub-Lease may be waived if, but only
if, such waiver is in writing and is signed by the party against
whom the enforcement of such waiver is sought. No waiver of any
provision of this Sub-Sub-Lease, in any one or more instances,
shall be deemed to be, or construed as, a further or continuing
waiver of any such provision. This Sub-Sub-Lease may not be
amended, modified or supplemented other than by a written
instrument signed by each party hereto.

19.       Entire
Agreement.

                       
This Sub-Sub-Lease constitutes the entire agreement and
understanding among the parties hereto and supercedes any and all
prior agreements and understandings, written or oral, relating to
the subject matter hereof.

20.      
Severability.

                       
Any term or provision of this Sub-Sub-Lease which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such invalidity or unenforceability
without rendering invalid or unenforceable the remaining terms and
provisions of this Sub-Sub-Lease or affecting the validity or
enforceability of any of the terms or provisions of this
Sub-Sub-Lease in any other jurisdictions, it being intended that
all rights and obligations of the parties hereunder shall be
enforceable to the fullest extent permitted by law.

[Signature
page follows]

IN WITNESS WHEREOF, this
Sub-Sub-Lease shall be deemed to have been executed and delivered
as of the date first set forth above.

		
SUBLANDLORD:

		
		
THE TITAN
CORPORATION,

a Delaware
corporation

		
		
By:
                                                                          

Name:                                                                      

		
Title:                                                                         

		
		
		
SUBTENANT:

		
		
SureBeam
Corporation,

a Delaware
corporation

		
		
By:
                                                                          

Name:                                                                      

		
Title:                                                                         

LANDLORD’S CONSENT TO
SUB-SUB-LEASE

The undersigned
("Landlord"), Landlord under the Master Lease, hereby consents to
the foregoing Sub-Sub-Lease without waiver of any restriction in
the Sub-Lease concerning further assignment or subletting. Landlord
certifies that, as of the date of Landlord's execution hereof,
Sublandlord is not in default or breach of any of the provisions of
the Sub-Lease, and that the Sub-Lease has not been amended or
modified except as expressly set forth in the Sub-Lease and
foregoing Sub-Sub-Lease.

Lessor:  
________                       
                                
                                  
..              

By:                                                                           

Title:                                                                          

Date:_______________________________________

EXHIBIT
A

DESCRIPTION OF PREMISES

[See
attached.]Sublease - Omaha, NE

SUBLEASE AGREEMENT

           
THIS SUBLEASE AGREEMENT (“Sublease”) is entered into as
of this 2nd day of August 2002, by and between The Titan
Corporation, a Delaware corporation (“Sublandlord”), andSureBeam Corporation, a
Delaware corporation (“Subtenant”).

RECITALS

A.       
Sublandlordis the tenant under that certain Office Building
Lease by and between Embassy Tower Limited Partnership, as landlord
(“Master Landlord”), and Sublandlord, as tenant, dated
May 17, 2000 (such lease, as it may be amended from time to
time, the “Master Lease”), for
certain space located at 9300 Underwood Avenue, Omaha, Douglas
County, Nebraska 68114 (the “Premises”).

B.        
Subtenant wishes to sublease a portion of the
Premises from Sublandlord.

           
Now, therefore, for good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, the parties
hereby agree as follows:

1.        
Basic Sublease Information.

The information set forth
in this Section (the “Basic Sublease Information”) is
intended to supplement and/or summarize the provisions set forth in
the balance of this Sublease.  Each reference in this Sublease
to any of the terms set forth below shall mean the respective
information set forth next to such term as amplified, construed or
supplemented by the particular Section(s) of the Sublease pertaining to such
information.  In the event of a conflict between the
provisions of this Section and the balance of the Sublease, the
balance of the Sublease shall control.

	
Sublandlord:

	
The Titan Corporation, a
Delaware corporation

		
	
Sublandlord’s
Address

 for Notices:

	
The Titan
Corporation

3033 Science Park
Road

San Diego, CA
92122

Attn: Real
Estate

(858) 552 -
9500

		
	
Subtenant:

	
SureBeam Corporation, a
Delaware corporation

		
	
Subtenant’s Address

 for Notices:

	
                       
SureBeam Corporation

9276 Scranton Road,
Suite 600

San Diego, CA
92121

Attn: Jerry
Nelson

(858)
795-6234

		
	
Subdemised
Premises:

	
Approximately 3,947
aggregate square feet

		
	
Building:

	
Embassy Tower

		
	
Permitted
Use:

	
As specified in Section 3
of the Master Lease as general office.

		
	
Base
Rent:

	
Six Thousand Four Hundred,
Thirteen Dollars and Eighty Cents ($6,413.80) per month (except for
any partial month during the term of this Sublease, in which case
Base Rent for such month shall be pro-rated based on the number of
days in that month), or $19.25 per rentable square foot per
year.

		
	
Commencement
Date:

	
The term of the Sublease
shall commence on August 2, 2002  (the
“Commencement Date”). 

		
	
Expiration
Date:

	
The Expiration Date shall be May 31, 2003,
or such earlier date, if any, on which the Master Lease is
terminated or expires or this Sublease is terminated pursuant to
the terms herein.

		
	
Subtenant’s
Insurance:

	
Specified and as required
in Sections 12 and 14 of the Master Lease.

		
	
Security
Deposit:

	
Six Thousand Four Hundred,
Thirteen Dollars and Eighty Cents ($6,413.80) payable in accordance
with Section 15 hereof.

2.        
Sublease.

Sublandlord hereby subleases to Subtenant, and
Subtenanthereby
subleases from Sublandlord, the Subdemised Premises upon all of the
terms, covenants and conditions in this Sublease.

3.        
Delivery Condition.

Subtenant acknowledges that it takes possession of the Subdemised Premises in its “as
is” condition, and further acknowledges that Sublandlordhas made no representations or warranties of any
kind or nature, whether express or implied, with respect to the
Subdemised Premises, the remainder of the Premises, the common
areas, or the Building, nor has Sublandlord agreed to undertake or perform any modifications,
alterations, or improvements to the Subdemised Premises, the
remainder of the Premises, the common areas or the Building which
would inure to Subtenant’s benefit. 

           
4.        
Term.

4.1      
Term.  The term (the “Term”) of this
Subleaseshall commence on the Commencement Date, and shall
end on the Expiration Date. 

4.2      
Surrender.  Subtenant shall, on or before the Expiration
Date, remove all personal property, furniture, trade fixtures and
other equipment,provided that the
removal of the same does not adversely affect the
Building structure or any Building operating system or is not
prohibited by the Master Lease, and that Subtenantpromptly repairs any damage to
the Building structure or its operating systems caused by such
removal pursuant to the requirements of the Master Lease.   In
the event that Subtenantfails to remove any such items as
required by this Section 4.2 by the Expiration Date, all such items
remaining on the Subdemised Premises after the Expiration Date
shall be deemed abandoned and Sublandlordmay dispose of
such items as it sees fit, without liability to
Subtenant.  Subtenant shall also be
responsible for the removal, on or before the Expiration Date, of
all alterations as required under the Master Lease installed by
Subtenant pursuant to this Sublease and shall be responsible for
any associated repair or restoration of the Subdemised Premises
required under the Master Lease.  In all other respects, Subtenant shall deliver the Subdemised
Premises broom clean, in its condition as of the Commencement Date,
reasonable wear and tear and casualty excepted.  In no event
shall Subtenantremove any of the plumbing,
electrical, data lines, and HVAC system(s), except as otherwise
required pursuant to this Section 4.2.

Subtenant shall vacate and deliver possession
of the Subdemised Premises free of all liens, charges or
encumbrances resulting from any act or omission on
Subtenant’spart, and free and clear of
any and all violations of any law, rule or regulation of any
federal, state, municipal or other agency or authority by reason of
Subtenant’s
actions or failures to fulfill any of its obligations under this
Sublease (“Violations”).  Subtenantshall indemnify Sublandlord against any and all loss, expense, damage, costs or
attorneys’ fees arising out of Violations
occurring any time on or after the Commencement Date.  The
voluntary or other surrender of this Sublease by Subtenant,or a
mutual cancellation thereof, shall not automatically terminate any
sub-subleases or sub-subtenancies or other agreements by which
Subtenant has granted rights to third parties to all or any part of
the Subdemised Premises, but shall, at the option of Sublandlord,either (1) terminate all or any existing
sub-subleases or sub-subtenancies or such other agreements, or (2) operate as an assignment to Sublandlordof any or all such sub-subleases or
sub-subtenancies or such other agreements.

4.3      
Holding Over. 
If Subtenant remains in possession of the Subdemised Premises after
the Expiration Date, such occupancy shall constitute a tenancy at
sufferance, and Subtenantshall be
obligated to pay 150% of the rental installments as specified in
Section 5 of this Sublease and Subtenantshall be liable to Sublandlordfor any and all claims,
damages, liabilities, costs and expenses (including
attorneys’ fees and expenses) incurred by Sublandlordand arising out of Subtenant’s failure to timely surrender the Subdemised Premises in
accordance with the requirements of this Sublease, including,
without limitation those incurred by Sublandlord arising under the
Master Lease.

5.        
Rent.

As used in this Sublease,
the term “Rent” shall include (1) Base Rent and (2) all other amounts which Subtenantis
obligated to pay under the terms of this Sublease.

5.1      
Rent.  Base Rent is as specified in
Section 1 (Basic Sublease Information).  Base Rent shall be
paid by Subtenant to the Master Landlord for the Sublandlord 
as set forth in Section 4 of the Master Lease and as subsequently
amended or modified. Subtenantshall also be solely responsible for
any and all increases in Rent or any added cost or charge which has
arisen solely because of Subtenant’s tenancy in the Subdemised Premises, including,
without limitation, any and all heat, water and sewer charges,
electric and other utility charges, as well as any other service
charges required by the Master Lease and relating to the Subdemised
Premises and/or Subtenant’s occupation thereof that are not
already then covered by the Base Rent (as defined in the Master
Lease), or Operating Expenses (as defined in the Master Lease)
passed through to Sublandlord under the Master Lease.

                       
5.2       [INTENTIONALLY
OMITTED]

5.3       Manner
of Payment.  All Rent or other payment due from Subtenant
to Sublandlord hereunder shall be paid in lawful money of the
United States, without any prior demand therefor and without any
deduction or setoff whatsoever, at the Master
Landlord’s  address pursuant to Section 4 of the Master
Lease or such other place as Sublandlord and/or Master landlord
shall from time to time designate (including, without limitation,
by wire transfer of immediately available funds to an account
specified by Sublandlord) by written notice provided to Subtenant
at least five (5) days prior to the date on which such Rent or
other amount first becomes payable.

           
6.        
Use and Compliance With
Laws.

Subtenantshall use
the Subdemised Premises for the Permitted Use (as specified in the
Basic Sublease Information) during the Term of this
Sublease, and for no other use or uses.  
Subtenantshall
not engage in any activities prohibited by the Master
Lease.  Subtenant shall not use or store flammable or
hazardous materials on the Subdemised Premises, except to the
extent normally used in the ordinary course of business with
respect to the Permitted Use unless such materials are specifically
prohibited in the Lease.  Subtenant shall not perform any act
or carry on any practice which may injure the Subdemised Premises
or cause any offensive odors or noises that constitute a nuisance
or menace to any other tenant or tenants of the Building or the
Premises or other persons, and in no event shall any noises or
odors be emitted from the Subdemised Premises.  Nothing shall
be done upon or about the Subdemised Premises which shall be
unlawful, improper, or contrary to any law, ordinance, regulation
or requirement of any public authority or insurance inspection or
rating bureau or similar organization having jurisdiction and
Subtenant shall be in compliance at all times with all such laws,
ordinances, regulations and requirements.  Subtenant shall
observe and comply with, and shall cause its employees, agents and
invitees to observe and comply with the restrictions set forth in
this Sublease.  Subtenant agrees to comply with all rules and
regulations that Master Landlord has made or may hereafter from
time to time make for the Building and/or the Premises. 
Sublandlord shall not be liable to Subtenant or any party claiming
through Subtenant in any way for damage caused by the failure of
any of the other tenants of the Building to comply with such
similar or other covenants in their leases or of such rules and
regulations.

           
7.        
Insurance.

                       
Subtenant shall
obtain at its sole expense the insurance required under Section 14
of the Master Lease effective as of the Commencement Date. 
Additionally, Subtenantshall
name Sublandlord and Master Landlord as
additional insureds, in their capacity as Master Landlord and
Sublandlord, and shall furnish Sublandlordon or before the Commencement Date with
certificates of insurance from its insurer, with respect to such
insurance, which certificates shall state that such insurance shall
not be cancelled unless thirty (30) days prior written notice shall
have been given to Master Landlord and Sublandlord.

           
8.
        Assignment and
Subletting.

                       
Subtenant shall not directly
or indirectly, voluntarily or by operation of law, sell, assign,
encumber, pledge or otherwise transfer or hypothecate any of its
interest in or rights with respect to the Subdemised Premises or
Subtenant’s
leaseholdestate
hereunder (collectively, “Assignment”),
or permit all or any portion of the Subdemised Premises to be
occupied by anyone (whether pursuant to a license, concession or
otherwise) other than Subtenant or sublet all or any portion of the
Subdemised Premises, without the prior written consent of Master
Landlord and Sublandlord. 

           
9.        
Alterations.

                       
Subtenant shall not make or
suffer to be made any alterations, additions or improvements to the
Subdemised Premises, including, without limitation, those related
to electrical cabling and/or systems, plumbing, data cabling, HVAC
systems, or modifications to existing finishes, without the prior
written consent of Master Landlord, as required under the Master
Lease, and of Sublandlord.  Additionally, Subtenant shall be subject to the
standards for repairs and alterations set forth in the Master
Lease. 

           
10.       Repairs and
Maintenance.

10.1    
Subtenant’s Responsibility.  Subtenantshall be responsible for the
maintenance and repair of the Subdemised Premises in accordance
with the provisions of the Master Lease.

10.2    
Sublandlord’s Responsibility. 
As between the parties to this Sublease, Sublandlordshall have no responsibility or liability to the
Subtenant or anyone claiming through Subtenant, for the Subdemised
Premises including, without limitation, the roof, roof covering,
foundation, subfloors, building structural
components, major building systems (plumbing, electrical and
heating, air conditioning and ventilation systems), and exterior
walls of the Subdemised Premises. 

           
11.      
Default.

Subtenant shall be subject to the same default
provisions as specified in Sections 17 and 18 and the applicable
portions of Exhibit C of the Master Lease as if it were the tenant
thereunder, and Sublandlordshall have all the remedies specified therein, as if it
were Master Landlord, including, without limitation, the right to
terminate the Sublease and right to perform Subtenant’s obligations under this
Sublease at Subtenant’s cost.  Notwithstanding the
foregoing, Subtenant shall only be entitled to one-half (1/2) of
the cure period for a default, if any, provided for under the
Master Lease.

           
12.      
Indemnity.

                       
In addition to such indemnities as may be provided for in the
Master Lease, Subtenant agrees to indemnify and hold Sublandlord
and its affiliates, officers, agents, servants, employees and
independent contractors (individually a “Sublandlord
Party” and collectively, “Sublandlord Parties”)
harmless against all loss, damage, liability, or expense suffered
or claimed against any Sublandlord Party, by any person or entity
(i) caused by or otherwise arising from, in whole or in part, any
breach or default by Subtenant of any covenant or obligation it has
hereunder (including but not limited to all covenants or
obligations of the tenant under the Master Lease assumed by
Subtenant pursuant to the terms of this Sublease), or (ii) caused
by or in connection with anything owned or controlled by Subtenant,
or (iii) resulting from any act, failure to act, or negligence of
Subtenant or its employees, agents or invitees, or (iv) resulting
from any nuisance suffered on the Subdemised Premises, except for
damage or injury to third parties or property resulting from the
proven gross negligence of Sublandlord, Landlord or their
respective employees, agents, representatives, successors or
assigns.  Subtenant further agrees to indemnify Sublandlord
and hold Sublandlord harmless from all losses, damages, liabilities
and expenses which Sublandlord may incur, or for which Sublandlord
may be liable to Master Landlord, arising from the acts or
omissions of Subtenant which are or are alleged to be defaults of
Sublandlord under the Master Lease or are the subject matter of any
indemnity or hold harmless of Sublandlord, as tenant, to Master
Landlord under the Master Lease.  The obligations of Subtenant
to indemnify Sublandlord and/or the Sublandlord Parties and/or hold
the Sublandlord and/or the Sublandlord Parties harmless in this
Section 12 and elsewhere herein shall survive the expiration or
other termination of this Sublease.

           
13.       Master
Lease.

           
13.1     Master Lease.  Notwithstanding
anything in this Sublease to the contrary, the rights of
Subtenant shall be subject
to and limited by the terms and conditions contained in the Master
Lease between Sublandlord and Master Landlord as applicable to
tenant thereunder, as they may be amended from time to time.   Sublandlordshall have the right to amend
the Master Lease from time to time without the consent of Subtenantprovided that any such amendment shall not
adversely affect Subtenant’sability to continue its
then current operations in the Subdemised Premises, increase any of
the rental or other payments required to be made by Subtenanthereunder or otherwise materially and
adversely change Subtenant’s rights and obligations
hereunder.  Sublandlordshall endeavor to give
Subtenantnotice of any amendment to the
Master Lease, but the failure to give such notice shall not affect
the validity of such amendment or its applicability to Subtenant, except that Subtenant shall
have no obligation to comply with the terms of any such amendment
until it has received a copy.  
Any rights granted to Subtenant herein which are limited by the
Master Lease shall be deemed to be so limited by this
Sublease.

                       
13.2     No Violation. 
Notwithstanding anything in this Sublease to the contrary, Subtenant shall not commit or permit
to be committed any act or omission which shall violate any term or
condition of the Master Lease.  Subtenant shall indemnify and
hold harmless Sublandlord from and against any loss, liability,
claim, cost or expense (including reasonable attorneys’ fees)
incurred by Sublandlord as a result of any termination or attempted
termination by Sublandlord or Master Landlord of the Master Lease
resulting from any such act or omission by Subtenant.

           
13.3     [Intentionally Deleted]

           
13.4     Termination of Master Lease.  If the Master
Lease terminates for any reason prior to the expiration or other
termination of this Sublease, this Sublease shall terminate
concurrently therewith without any liability of Sublandlord to Subtenant and, except for any
Subtenant obligations hereunder arising on or prior to the
termination of this Sublease, following Subtenant’s surrender
in compliance with Section 4.2 hereof, Subtenant’s
obligations hereunder shall terminate, except with respect to any
indemnification or hold harmless obligations of Subtenant, which
shall survive such termination.

           
13.5     Incorporation of Master Lease.  Notwithstanding any other provision of this
Sublease to the contrary, this Sublease and Subtenant's rights
under this Sublease shall at all times be subject to all of the
terms, covenants, and conditions of the Master Lease (a copy of
which agreement, as currently in effect, Subtenant hereby
represents that it has received), with the same force and effect as
if fully set forth herein, and except as otherwise expressly
provided for herein, Subtenant shall keep, observe and perform or
cause to be kept, observed and performed, faithfully all those
terms, covenants and conditions of Sublandlord as tenant under the
Master Lease with respect to the Subdemised Premises.  Except
as otherwise provided hereby, the terms, conditions, rights and
responsibilities of the Master Lease are incorporated herein by
reference, and Sublandlord shall have the rights
and responsibilities with respect to the Subtenantthat the
Master Landlord has with respect to Sublandlord
pursuant to the Master Lease, and Subtenantshall have the rights and responsibilities
with respect to Sublandlordthat Sublandlordhas with respect to the Master Landlord pursuant to
the Master Lease.  However, to the extent that the Master
Lease requires or obligates Master Landlord to maintain, repair,
restore, or otherwise expend any money or take any action to
preserve and maintain all or any portion of the Subdemised Premises
or to furnish any services to the Subdemised Premises, such
obligation shall not pass to Sublandlord by reason of this Sublease
and shall remain with the Master Landlord.  Subject to the
first sentence of this Section 13.5, with respect to the
relationship between the Sublandlord and the Subtenant, the terms,
covenants and conditions of this Sublease shall control with
respect to any conflict or inconsistency between the terms,
covenants and conditions contained herein and the terms, covenants
and conditions of the Master Lease.  Notwithstanding the
foregoing, the following sections of the Master Lease are hereby
excluded from application to or incorporation within this
Sublease:  Sections 4(a), 4(d), 4(e), 6, 19, 21, 23(h), 23(j)
and 24, as well as provisions contained in Exhibit C which pertain
to the matters dealt with in the referenced provisions.

14.      
Parking.

                       
Parking spaces (if any) shall be used in accordance with the terms
of the Master Lease, particularly Section 25 to the Master
Lease.  Sublandlord makes no representation or warranty
concerning the availability of parking spaces, whether free of
charge or otherwise.

15.      
Security Deposit.

                       
Upon execution of this Sublease, Subtenant shall deposit with
Sublandlord the sum of Six Thousand Four Hundred, Thirteen Dollars
and Eighty Cents ($6,413.80) as a security deposit either in cash
or in the form of a Letter of Credit acceptable to and approved by
Sublandlord, for the performance by Subtenant of the provisions of
this Sublease (the “Security Deposit”). 
Sublandlord shall have the right but not the obligation to use the
Security Deposit, or any portion thereof, to cure any breach or
default of Subtenant or to compensate Sublandlord for damages
sustained as a result of any breach or default by Subtenant
hereunder.  In the event Sublandlord in its sole discretion so
utilizes all or a portion of the Security Deposit from time to
time, Subtenant shall within five (5) days of notice from
Sublandlord restore the Security Deposit to its original
amount.  If no breach or default of Subtenant exists and no
amounts are owing from Subtenant to Sublandlord as of the
expiration of the Term, Sublandlord shall return any Security
Deposit then held by Sublandlord to Subtenant within sixty (60)
days of such expiration.

16.      
Brokers.

                       
Subtenant represents that it has dealt with no broker or agent in
connection with this Sublease and Subtenant shall hold Sublandlord
harmless from any and all liability, loss, damage, expense, claim
action, demand, suit or obligation arising out of or relating to a
breach by Subtenant of such representation.

17.      
Counterparts.

                       
This Sublease may be executed in one or more counterparts, each of
which shall constitute one and the same instrument.

18.      
Governing Law.

                       
This Sublease shall be governed by and construed and enforced in
accordance with the laws of the State of Nebraska, except with
respect to the choice-of-law provisions thereof.

19.      
Waivers; Amendments.

                       
No failure or delay by any party hereto in exercising any right,
power or privilege hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise thereof preclude any other or
further exercise thereof or the exercise of any other right, power
or privilege. The rights and remedies provided herein shall be
cumulative and not exclusive of any rights or remedies provided by
law. Any provision of this Sublease may be waived if, but only if,
such waiver is in writing and is signed by the party against whom
the enforcement of such waiver is sought. No waiver of any
provision of this Sublease, in any one or more instances, shall be
deemed to be, or construed as, a further or continuing waiver of
any such provision. This Sublease may not be amended, modified or
supplemented other than by a written instrument signed by each
party hereto.

20.       Entire
Agreement.

                       
This Sublease constitutes the entire agreement and understanding
among the parties hereto and supercedes any and all prior
agreements and understandings, written or oral, relating to the
subject matter hereof.

21.      
Severability.

                       
Any term or provision of this Sublease which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such invalidity or unenforceability
without rendering invalid or unenforceable the remaining terms and
provisions of this Sublease or affecting the validity or
enforceability of any of the terms or provisions of this Sublease
in any other jurisdictions, it being intended that all rights and
obligations of the parties hereunder shall be enforceable to the
fullest extent permitted by law.

[Signature
page follows]

IN WITNESS WHEREOF, this
Sublease shall be deemed to have been executed and delivered as of
the date first set forth above.

		
SUBLANDLORD:

		
		
THE TITAN
CORPORATION,

a Delaware
corporation

		
		
By:
                                                                          

Name:                                                                      

		
Title:                                                                         

		
		
		
SUBTENANT:

		
		
SUREBEAM CORPORATION, a
Delaware corporation

		
		
By:
                                                                          

Name:                                                                      

		
Title:                                                                         

EXHIBIT
A

DESCRIPTION OF SUBDEMISED PREMISES

[See attached.]

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