Document:

AMENDMENT
      NO. 1 TO 

    

    STOCK
      PURCHASE AGREEMENT

    

    This
      Amendment No. 1 (this “Amendment”),
      dated
      October 22, 2008, to the Stock Purchase Agreement (as defined below) is made
      by
      and among Vector Intersect Security Acquisition Corporation, a Delaware
      corporation (“Parent”),
      Cyalume Acquisition Corp., a Delaware corporation (“Purchaser”), Cyalume
      Technologies, Inc., a Delaware corporation (the “Company”),
      and
      GMS Acquisition Partners Holdings, LLC (“Seller”).
      Any
      capitalized term not defined herein shall have the meaning for such term
      specified in the Stock Purchase Agreement.

    

    WHEREAS,
      Parent,
      Purchaser, the Company and Seller entered into a Stock Purchase Agreement dated
      February 14, 2008, (the “Stock
      Purchase Agreement”);
      and

    

    WHEREAS,
      Sections
      2.3(c)(ii) and (iii) of the Stock Purchase Agreement set forth certain terms
      governing the payment of the Estimated Purchase Price to or for the benefit
      of
      the Members who hold Series A Preferred Units of Seller as of the Closing Date;
      and 

    

    WHEREAS,
      Parent,
      Purchaser, the Company and the Sellers desire to amend the terms of such
      payments so that the Members holding Series A Preferred Units of Seller shall
      receive and Parent shall issue additional Parent Common Stock in lieu of an
      amount in cash equal to $10,000,000.

    

    NOW
      THEREFORE, in
      consideration of the foregoing and the representations, warranties, covenants
      and agreements herein contained and other good and valuable consideration,
      the
      receipt and sufficiency of which is hereby acknowledged, the parties hereto
      hereby agree as follows:

    

    1. Section
      2.3(c)(ii) of the Stock Purchase Agreement is hereby amended by deleting the
      number $15,000,000 and replacing
      it with the number $5,000,000.

    

    2. Section
      2.3(c)(iii) of the Stock Purchase Agreement is hereby amended by deleting the
      number $15,000,000 and replacing it with the number $5,000,000.

    

    3. The
      Amendment set forth herein is limited precisely as written and shall not be
      deemed to be an amendment of any other term or condition of the Stock Purchase
      Agreement or any of the documents referred to therein. For the avoidance of
      doubt, the purpose of this Amendment is to change the form of payment with
      respect to a portion of the amount payable to the Members holding Series A
      Preferred Units of Seller, and not to change the aggregate Purchase Price
      payable under the Stock Purchase Agreement. Whenever the Stock Purchase
      Agreement is referred to in any agreement, document or instrument, such
      reference shall be to the Stock Purchase Agreement as amended hereby. Except
      as
      expressly amended hereby, the terms and conditions of the Stock Purchase
      Agreement shall continue in full force and effect.

    

    4. This
      Amendment may be signed in any number of counterparts, each of which shall
      be an
      original and all of which shall be deemed to be one and the same instrument,
      with the same effect as if the signatures thereto and hereto were upon the
      same
      instrument. A facsimile signature shall be deemed to be an original signature
      for purposes of this Amendment.

     

    5. This
      Amendment is intended to be in full compliance with the requirements for an
      Amendment to the Stock Purchase Agreement as required by Section 14.2 of the
      Stock Purchase Agreement, and every defect in fulfilling such requirements
      for
      an effective amendment to the Stock Purchase Agreement is hereby ratified,
      intentionally waived and relinquished by all parties hereto. 

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    IN
      WITNESS WHEREOF,
      the
      parties hereto have duly executed this Amendment No.1 to the Stock Purchase
      Agreement as of the day and year first above written.

     

    

      
        	 	
                VECTOR
                  INTERSECT ACQUISITION CORP.

              	 
	 	 	 	 
	 	 	 	 
	 	
                By: 
                  

              	
                /s/
                  Yaron Eitan

              	 
	 	 	
                Name:
                  Yaron Eitan

              	 
	 	 	
                Title:
                  Chief Executive Officer 

              	 
	 	 	 	 
	 	
                CYALUME
                  ACQUISITION CORP.

              	 
	 	 	 	 
	 	 	 	 
	 	
                By: 
                  

              	
                /s/
                  Yaron Eitan

              	 
	 	 	
                Name:
                  Yaron Eitan

              	 
	 	 	
                Title:
                  Director 

              	 
	 	 	 	 
	 	
                CYALUME
                  TECHNOLOGIES, INC.

              	 
	 	 	 	 
	 	 	 	 
	 	
                By: 
                  

              	
                /s/
                  Michael Bielonko

              	 
	 	 	
                Name:
                  Michael Bielonko

              	 
	 	 	
                Title:
                  Chief Financial Officer

              	 
	 	 	 	 
	 	
                GMS
                  ACQUISITION PARTNERS HOLDINGS, LLC

              	 
	 	 	 	 
	 	 	 	 
	 	
                By: 
                  

              	
                /s/
                  Frank R. Kline

              	 
	 	 	
                Name:
                  Frank R. Kline

              	 
	 	 	
                Title:
                  DirectorThe
      Statistic Report of Market Share of Chinese Music Websites June
      2008

     

    (Concise
      Version)

     

    China
      Internet Index System (CIIS) Core Report

     

    

    

    Jul,
      2008

    

    
      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

    

    

    Table
      of contents

     

    
      	
              About
                ChinaLabs

            	
              3

            
	 	 
	
              About
                China Internet Index System (CIIS)

            	
              4

            
	 	 
	
              Statistics
                of Market Share of Top50 Music Websites

            	
              7

            
	 	 
	
              Analysis
                of the Concentration of the Top Music Websites

            	
              8

            
	 	 
	
              Table
                of Contents of ChinaLabs Market Share Reoport

            	
              14

            
	 	 
	
              Legal
                Statement and Disclaimer

            	
              15

            

    

    

    

    
      
        
          
          

        

        
          2

          
            

          

        

        
          
          

        

      

    

    

    About
      ChinaLabs

    

    Founded
      in 1999, ChinaLabs is a Chinese IT consulting company with a global
      outlook.

    

    ChinaLabs
      is specialized in these industries: IT, Internet, Telecommunication, Enterprise
      Informatization, E-government and Value-added Internet Services, etc. ChinaLabs
      provides companies inside and outside of those industries, as well as
      governments with its services like strategy consulting, management consulting,
      marketing planning, monographic study, and market research, strategy/outcome
      evaluation with the help of its accumulated methodology, industry experiences,
      and in close partnership with an external network of experts.

    

    

    
      
        
          
          

        

        
          3

          
            

          

        

        
          
          

        

      

    

    

    About
      China Internet Index System

     

    China
      Internet Index System (CIIS) was co-released by ChinaLabs (www.chinalabs.com)
      and National Bureau of Statistics of China(NBS) in 2004.

     

    China
      Internet Index System (CIIS) is a comprehensive index ranking system which
      provides decision-making reference for the study of the operational conventions
      of the Chinese internet economy, the forecast of the fluctuation trend of
      Internet economy, the implementing of macro control and regulation of Internet
      economy, and the operation of enterprises.

    

    China
      Internet Index System (CIIS) has made preliminary study into the Chinese
      internet economy from macro and micro levels and in-between, covering
      infrastructure and customer satisfaction, development of internet in different
      areas and industry performance, the performance of listed companies in internet
      industry and Chinese-language websites, providing solid reference to those
      who
      want to know the current development situation and trend of Chinese Internet
      economy.

    

    CIIS
      consists of four main index systems. They are:

    

    
      	 	
              l

            	
              Chinese
                Internet Infrastructure Index

            

    

    
      	 	
              l

            	
              Chinese
                Internet Satisfaction Index

            

    

    
      	 	
              l

            	
              Chinese
                Internet Performance Index

            

    

    
      	 	
              l

            	
              Chinese
                Internet Stock Index

            

    

    

    Infrastructure
      Index

     

    Infrastructure
      index is a scalar measurement of the affecting
      factors
which
      are
      fundamental and protective to the development of Internet industry. CIIS adopts
      4 indexes to evaluate Internet Infrastructure Index: number of netizens, number
      of domains, total international internet bandwidth and number of
      internet-connected computers.

    

    Satisfaction
      Index

    

    Satisfaction
      index is
      a measure of user satisfaction of products and services when they spend money
      via internet. Data of Satisfaction
      Index
      comes
      from issues of CNNIC <Internet Development Statistics
      Report>.

    

    

    
      
        
          
          

        

        
          4

          
            

          

        

        
          
          

        

      

    

    

    Performance
      Index

    

    l Popularity
      Index

    l Composite
      Index

    l Structure
      Index

    

    Performance
      Index describes the internet economy at the internet performance level,
      including three important indexes:

    

    1.
      Popularity Index, which is calculated based on Alexa data, selects the mostly
      visited websites as member websites, calculates the weighted average of the
      IP
      value and PV value, compares it with other websites’, and get the Popularity
      Indexes.

    

    2.
      Composite Index represents comparative
      trend of
      the overall flows level between Chinese websites and the globe’s. Providing the
      number of global daily visit stay stable, it can tell the trend of Chinese
      websites’ flows and the overall tendency of China internet industry
      development.

    

    3.
      Structure Index is the result which shows the actual effect of Internet in
      China, the balance rate and maturity of entire internet industry, based on
      traffic of particular websites.

    

    Internet
      Stock Index

     

    Internet
      Stock Index is designed to reflect the general performance of overseas listed
      Chinese Internet companies (at the basic service level and value-added service
      level of Internet industry) which can be invested in, including overseas listed
      Concept Internet companies from China. The Index is released daily after the
      closing of stock exchange. 

    

    

    
      
        
          
          

        

        
          5

          
            

          

        

        
          
          

        

      

    

    

    Market
      share Statistics of Top50 Music Websites

    

    

     

    

    
      
        
          
          

        

        
          6

          
            

          

        

        
          
          

        

      

    

     

    
      
        

      

    

    Analysis
      of Concentration of Music Websites Industry 

    
      

    

    

    Market
      Share of Top3 Music Websites

    

    

    

    Market
      Share of Top10 Music Websites

     

    

     

    

    
      
        
          
          

        

        
          7

          
            

          

        

        
          
          

        

      

    

    

    Analysis
      of Top10 Music Websites

     

    sogua.com

     

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change

               in week

            	 	
              Ratio 

              changes

               in week

            	 	
              Highest

               value in 

              week

            	 	
              Lowest 

              value

               in

               week

            	 	
              Value 

              changes 

              per 

              month

            	 	
              Ratio 

              changes 

              per 

              month

            	 	
              Highest 

              value in 

              month

            	 	
              Lowest

               value

               in 

              month

            	 
	
              CIIS 

            	 	 	
              26.79

            	 	 	
              ↑11.3

            	 	 	
              ↑60.69

            	
              %

            	 	
              36.49

            	 	 	
              22.86

            	 	 	
              ↓3.12

            	 	 	
              ↓11.38

            	
              %

            	 	
              38.69

            	 	 	
              3.9

            	 
	
              Rank

            	 	 	
              1

            	 	 	
              ↓4.89

            	 	 	
              ↓79.16

            	
              %

            	 	
              1

            	 	 	
              2

            	 	 	
              ↑1

            	 	 	
              ↑42.88

            	
              %

            	 	
              1

            	 	 	
              15

            	 

    

    

    

    

    1ting.com

    

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change

               in week

            	 	
              Ratio 

              changes 

              in week

            	 	
              Highest 

              value in 

              week

            	 	
              Lowest 

              value 

              in 

              week

            	 	
              Value 

              changes

               per 

              month

            	 	
              Ratio 

              changes 

              per 

              month

            	 	
              Highest 

              value in

               month

            	 	
              Lowest 

              value

               in 

              month

            	 
	
              CIIS
                

            	 	 	
              7.49

            	 	 	
              ↓2.65

            	 	 	
              ↓9.97

            	
              %

            	 	
              33.42

            	 	 	
              7.49

            	 	 	
              ↓0.62

            	 	 	
              ↓2.87

            	
              %

            	 	
              33.42

            	 	 	
              3.94

            	 
	
              Rank

            	 	 	
              7

            	 	 	
              ↑1.8

            	 	 	
              ↑135.71

            	
              %

            	 	
              1

            	 	 	
              7

            	 	 	
              ↑1

            	 	 	
              ↑24.14

            	
              %

            	 	
              1

            	 	 	
              14

            	 

    

    

    

    
      
        
          
          

        

        
          8

          
            

          

        

        
          
          

        

      

    

    

    

    

    fenbei.com

    

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change 

              in week

            	 	
              Ratio

               changes 

              in week

            	 	
              Highest 

              value in 

              week

            	 	
              Lowest 

              value 

              in 

              week

            	 	
              Value 

              changes

               per 

              month

            	 	
              Ratio 

              changes 

              per 

              month

            	 	
              Highest 

              value in 

              month

            	 	
              Lowest

               value 

              in 

              month

            	 
	
              CIIS 

            	 	 	
              14.58

            	 	 	
              ↑0.46

            	 	 	
              ↑3.72

            	
              %

            	 	
              19.72

            	 	 	
              6.49

            	 	 	
              ↓2.86

            	 	 	
              ↓14.98

            	
              %

            	 	
              33.29

            	 	 	
              6.49

            	 
	
              Rank

            	 	 	
              2

            	 	 	
              ↓2

            	 	 	
              ↓28.58

            	
              %

            	 	
              2

            	 	 	
              10

            	 	 	
              ↑1

            	 	 	
              ↑22.55

            	
              %

            	 	
              1

            	 	 	
              11

            	 

    

     

    

    
      
        
          
          

        

        
          9

          
            

          

        

        
          
          

        

      

    

    

    

    

    haoting.com

    

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change 

              in week

            	 	
              Ratio 

              changes 

              in week

            	 	
              Highest 

              value in 

              week

            	 	
              Lowest

               value 

              in 

              week

            	 	
              Value 

              changes 

              per 

              month

            	 	
              Ratio 

              changes 

              per 

              month

            	 	
              Highest 

              value in

               month

            	 	
              Lowest 

              value

               in 

              month

            	 
	
              CIIS 

            	 	 	
              4.59

            	 	 	
              ↓3.19

            	 	 	
              ↓16.68

            	
              %

            	 	
              22.65

            	 	 	
              4.59

            	 	 	
              ↓1.08

            	 	 	
              ↓6.29

            	
              %

            	 	
              22.7

            	 	 	
              4.59

            	 
	
              Rank

            	 	 	
              11

            	 	 	
              ↑2.59

            	 	 	
              ↑91.59

            	
              %

            	 	
              3

            	 	 	
              11

            	 	 	
              —

            	 	 	
              ↑10.22

            	
              %

            	 	
              1

            	 	 	
              11

            	 

    

     

    

    
      
        
          
          

        

        
          10

          
            

          

        

        
          
          

        

      

    

    

    

     

    9sky.com

    

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change 

              in week

            	 	
              Ratio 

              changes

               in week

            	 	
              Highest 

              value in 

              week

            	 	
              Lowest 

              value 

              in a 

              week

            	 	
              Value

               changes 

              per 

              month

            	 	
              Ratio 

              changes

               per

               month

            	 	
              Highest 

              value in 

              month

            	 	
              Lowest 

              value 

              in 

              month

            	 
	
              CIIS 

            	 	 	
              13.06

            	 	 	
              ↓0.91

            	 	 	
              ↓6.26

            	
              %

            	 	
              15.25

            	 	 	
              10.62

            	 	 	
              ↑1.63

            	 	 	
              ↑14.83

            	
              %

            	 	
              16.61

            	 	 	
              8.12

            	 
	
              Rank

            	 	 	
              4

            	 	 	
              ↑0.26

            	 	 	
              ↑6.28

            	
              %

            	 	
              4

            	 	 	
              6

            	 	 	
              ↓1

            	 	 	
              ↓13.32

            	
              %

            	 	
              1

            	 	 	
              8

            	 

    

    

    

    
      
        
          
          

        

        
          11

          
            

          

        

        
          
          

        

      

    

    

    

     

    qq163.com

    

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change 

              in week

            	 	
              Ratio 

              changes

               in week

            	 	
              Highest

               value in 

              week

            	 	
              Lowest

               value 

              in 

              week

            	 	
              Value 

              changes 

              per 

              month

            	 	
              Ratio

               changes

               per 

              month

            	 	
              Highest 

              value in 

              month

            	 	
              Lowest 

              value

               in 

              month

            	 
	
              CIIS 

            	 	 	
              13.45

            	 	 	
              ↓1.77

            	 	 	
              ↓15.63

            	
              %

            	 	
              13.45

            	 	 	
              3.43

            	 	 	
              ↓0.12

            	 	 	
              ↓1.17

            	
              %

            	 	
              17.26

            	 	 	
              2.99

            	 
	
              Rank

            	 	 	
              3

            	 	 	
              ↑1.88

            	 	 	
              ↑32.24

            	
              %

            	 	
              3

            	 	 	
              16

            	 	 	
              ↑1

            	 	 	
              ↑17.61

            	
              %

            	 	
              3

            	 	 	
              16

            	 

    

     

    

    
      
        
          
          

        

        
          12

          
            

          

        

        
          
          

        

      

    

    

    

    

    8box.cn

    

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change 

              in week

            	 	
              Ratio

               changes 

              in week

            	 	
              Highest 

              value in 

              week

            	 	
              Lowest 

              value

               in 

              week

            	 	
              Value

               changes 

              per 

              month

            	 	
              Ratio 

              changes 

              per 

              month

            	 	
              Highest 

              value in 

              month

            	 	
              Lowest 

              value 

              in 

              month

            	 
	
              CIIS 

            	 	 	
              10.12

            	 	 	
              ↑0.22

            	 	 	
              ↑2.74

            	
              %

            	 	
              10.12

            	 	 	
              6.97

            	 	 	
              ↑2.9

            	 	 	
              ↑51.08

            	
              %

            	 	
              14.65

            	 	 	
              3.14

            	 
	
              Rank

            	 	 	
              5

            	 	 	
              ↓1.53

            	 	 	
              ↓17.59

            	
              %

            	 	
              5

            	 	 	
              9

            	 	 	
              ↓4

            	 	 	
              ↓34.55

            	
              %

            	 	
              3

            	 	 	
              15

            	 

    

     

    

    
      
        
          
          

        

        
          13

          
            

          

        

        
          
          

        

      

    

    

    

     

    520music.com

    

    
      	
              Popularity  

            	 	
              Value

               today

            	 	
              Value 

              change

               in week

            	 	
              Ratio 

              changes

               in week

            	 	
              Highest 

              value in

               a week

            	 	
              Lowest 

              value 

              in 

              week

            	 	
              Value 

              changes 

              per 

              month

            	 	
              Ratio 

              changes 

              per 

              month

            	 	
              Highest 

              value in 

              month

            	 	
              Lowest 

              value

               in 

              month

            	 
	
              CIIS 

            	 	 	
              9.05

            	 	 	
              ↓2.36

            	 	 	
              ↓23.4

            	
              %

            	 	
              9.36

            	 	 	
              4.37

            	 	 	
              ↑0.75

            	 	 	
              ↑9.96

            	
              %

            	 	
              13.84

            	 	 	
              4.37

            	 
	
              Rank

            	 	 	
              6

            	 	 	
              ↑0.64

            	 	 	
              ↑8.57

            	
              %

            	 	
              6

            	 	 	
              13

            	 	 	
              —

            	 	 	
              ↓1.39

            	
              %

            	 	
              5

            	 	 	
              13

            	 

    

    

    

    
      
        
          
          

        

        
          14

          
            

          

        

        
          
          

        

      

    

    

    

    

    yobo.com

    

    
      	
              Popularity  

            	 	
              Value 

              today

            	 	
              Value 

              change

               in week

            	 	
              Ratio 

              changes

               in week

            	 	
              Highest 

              value in 

              week

            	 	
              Lowest 

              value

               in a 

              week

            	 	
              Value 

              changes 

              per 

              month

            	 	
              Ratio 

              changes 

              per 

              month

            	 	
              Highest

               value 

              in month

            	 	
              Lowest

               value

               in 

              month

            	 
	
              CIIS 

            	 	 	
              1.89

            	 	 	
              ↓3.43

            	 	 	
              ↓51.12

            	
              %

            	 	
              8.76

            	 	 	
              1.69

            	 	 	
              ↑1.44

            	 	 	
              ↑25.5

            	
              %

            	 	
              17.21

            	 	 	
              1.69

            	 
	
              Rank

            	 	 	
              25

            	 	 	
              ↑10.57

            	 	 	
              ↑105.71

            	
              %

            	 	
              7

            	 	 	
              28

            	 	 	
              ↑2

            	 	 	
              ↑20.98

            	
              %

            	 	
              3

            	 	 	
              28

            	 

    

    

    

    
      
        
          
          

        

        
          15

          
            

          

        

        
          
          

        

      

    

    

    

    

    6621.com

    

    
      	
              Popularity  

            	 	
              Value

               today

            	 	
              Value 

              change 

              in week

            	 	
              Ratio

               changes 

              in week

            	 	
              Highest 

              value in 

              week

            	 	
              Lowest 

              value 

              in 

              week

            	 	
              Value 

              changes 

              per 

              month

            	 	
              Ratio 

              changes 

              per

               month

            	 	
              Highest 

              value in 

              month

            	 	
              Lowest 

              value 

              in

               month

            	 
	
              CIIS 

            	 	 	
              6.59

            	 	 	
              ↓1.41

            	 	 	
              ↓15.29

            	
              %

            	 	
              9.83

            	 	 	
              6.46

            	 	 	
              ↑2.38

            	 	 	
              ↑50.21

            	
              %

            	 	
              12.01

            	 	 	
              2.31

            	 
	
              Rank

            	 	 	
              9

            	 	 	
              ↑0.35

            	 	 	
              ↑4.76

            	
              %

            	 	
              5

            	 	 	
              11

            	 	 	
              ↓4

            	 	 	
              ↓28.05

            	
              %

            	 	
              5

            	 	 	
              19

            	 

    

     

    

    
      
        
          
          

        

        
          16

          
            

          

        

        
          
          

        

      

    

    

    

    

    
      
        
        

      

      
        17

        
          

        

      

      
        
        

      

    

     

    Index
      of ChinaLabs Market Share Reports 

    
      

    

     

    

     

    

    
      
        
          
          

        

        
          18

          
            

          

        

        
          
          

        

      

    

    

    Legal
      Statement and Disclaimer 

    
      

    

    

    This
      report was prepared and issued by ChinaLabs.com, and all texts, images and
      forms
      included hereinabove in this report are protected by related intellectual
      property laws of China. Unauthorized commercial use of the information in this
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