1. L3 Communications Holdings Inc. (LLL) Jim Clark Doug Coursen Addison Doyle Andrew Felten Kevin Freeman SIA Analyst Program Wednesday March 28, 2007

2. Overview  L3 Communications Holdings Inc. (LLL)  Traded on NYSE  Prime System Contractor in: Aircraft Modernization Communications Intelligence Surveillance and Reconnaissance (C 3 ISR) Government Services

3. L3 Rankings  For the past two years L3 has been listed on the Business 2.0 100 Fastest Growing Tech Companies  L3 is ranked 253 in the Fortune 500

4. Directors  Michael T. Strianese President, Chief Executive Officer and Director  Jimmie V. Adams Senior Vice President, Washington Operations  Robert W. RisCassi Senior Vice President  Kathleen E. Karelis Senior Vice President, General Counsel and Corporate Secretary  Curtis Brunson Senior Vice President - Corporate Strategy and Development  David T. Butler III Senior Vice President - Business Operations  Ralph G. D'Ambrosio Vice President and Chief Financial Officer

5. Prime Contractors  United States Department of Defense (DoD)  United States Department of Homeland Security (DHS)  US Government Intelligence Agencies  Major Aerospace and Defense Contractors  Allied Government Ministries of Defense  US Federal, State, and Local Agencies

6. Business Strategy  Intend to grow sales both organically and through acquisition of complementary businesses.  Continue building upon position as leading supplier of systems, sub-systems, products and services to the DoD and other US Agencies.

7. Business Strategy Cont.  Supporting Customer Requirements  Increase Cost Competitiveness  Maintaining Diversified Business Mix  Develop and Retain Talented Management and Technical Employees  Capitalizing on Strategic Business Acquisition Opportunities

8. Recent Acquisitions  TRL Electronics plc. (TRL) July 2006 $171.4 M Provides Advanced Radio and Satellite Communications Systems  Crestview Aerospace Corp. June 2006 $146.3M Provides Aircraft Structures and Military Aircraft Modifications for Prime Systems Contractors

9. Breakdown By Sector 2006 (numbers in Millions)

10. Historic Breakdown By Sector (numbers in Millions) (Both Services and Products)

11. Breakdown of International Sales (numbers in millions)

12. L3 Headlines  March 22, 2007: L3 Communications gets $12.1M Navy deal (AP)  March 19, 2007: L3 Communications wins $22M Army order (AP)  March 15, 2007: L3 gets $43 million Army contract (AP)  March 14, 2007: L3 Communications Link Simulation and Training Awarded $43.7M Contract to Maintain C-9 Aircraft (Business Wire)

13. Competitors  The Defense Industry is undoubtedly wide growing and most if not all of the companies which compete for defense contracts have had large increases in business in the past 10 years.  L3, like its competitors, has consistently grown with the industry average General Dynamics Corp. (GD) Northrop Grumman Corporation (NOC) Raytheon Co. (RTN)

14. How To Beat The Competition  Maintain the effectiveness and innovation of our technologies and research and development programs.  Maintain ability to offer better program performance than our competitors at a lower cost.  Maintain ability to retain our employees and hire new ones, particularly those who have U.S. Government security clearances; and the capabilities of our facilities, equipment and personnel to undertake the programs for which we compete.

15. Analyst Outlook  “LLL will in our view continue to grow revenues, continue to make acquisitions, and continue to perform for its customers. This has been and we believe should be a formula for success as a defense company and a defense stock.” -Joseph Campbell, Lehman Brothers Equity Research

16. 3L Risk Factors  Large Amount of Debt Significant level of debt due to many recent acquisitions Ability to pay back debt depends on future revenues  Rely on US Government Entities End of year 2006, approx. 1900 contracts with estimated values over $1 Million

17. Pros and Cons of L3  Pros Top 100 Tech Stocks Large Growth Potential New Acquisitions are Already Performing Defense Sector is Booming  Cons High Debt Competition is Growing Changes in Defense Spending Could Be Detrimental

18. Thank You SIA Analyst Program Meeting March 28, 2007 Group 9