L-3 Communications Holdings, Inc. is a prime contractor in aerospace systems and national security solutions. The Company operates through its wholly owned subsidiary L-3 Communications Corporation. It is also a provider of a range of communication and electronic systems and products used on military and commercial platforms. Its customers include the United States (U.S.) Department of Defense (DoD) and its prime contractors, Government intelligence agencies, the Department of Homeland Security (DHS), Department of State (DoS), allied international governments, and domestic and international commercial customers. The Company operates in four segments: Aerospace Systems, Electronic Systems, Communication Systems and National Security Solutions.