Northrop Grumman Corp. engages in the provision of advanced aircraft systems. It operates through the following segments: Aeronautics Systems, Defense Systems, Mission Systems, and Space Systems. The Aeronautics Systems segment is involved in the design, development, production, integration, sustainment, and modernization of advanced aircraft systems for the U.S. Air Force, the U.S. Navy, other U.S. government agencies, and international customers. The Defense Systems segment includes integrated battle management systems, weapons systems and aircraft, and mission systems sustainment and modernization. The Mission Systems segment offers advanced mission solutions and multifunction systems, primarily for the U.S. defense and intelligence community, and international customers. The Space Systems segment delivers end-to-end mission solutions through the design, development, integration, production and operation of space, missile defense, launch and strategic missile systems for national security, civil government, commercial, and international customers. The company was founded by John K. Northrop, Thomas V. Jones, and Kent Kresa in 1939 and is headquartered in Falls Church, VA.