L-3 Communications Holdings, Inc. (L-3 Holdings), through its wholly owned subsidiary, L-3 Communications Corporation(L-3), is a prime system contractor in aircraft modernization and maintenance (AM&M), command, control, communications, intelligence, surveillance and reconnaissance (C3ISR) systems, and government services. L-3 is also a provider of technology products, subsystems and systems. The Company’s customers include the United States Department of Defense and its prime contractors, United States Government intelligence agencies, the Unites States Department of Homeland Security (DHS), Unites States Department of State, United States Department of Justice, allied foreign governments, commercial customers and select other United States federal, state and local government agencies. The Company operates in four segments: C3ISR, Government Services, AM&M, and Specialized Products. On January 30, 2009, the Company completed the acquisition of Chesapeake Sciences Corporation.