Southern California’s shrinking aerospace industry

A shrinking aerospace industry Southern California was once a center of the aerospace industry, but the number of aircraft companies headquartered here has been steadily shrinking.Some key events:1967: Douglas Aircraft of Long Beach merges with McDonnell Aircraft, forming St. Louis-based McDonnell Douglas Corp., which is acquired by Boeing Co. in 1997.1995: Lockheed Corp., headquartered in Calabasas and with major operations in Burbank, merges with Martin Marietta Corp. to form Lockheed Martin Corp. and moves to Bethesda, Md. 1996: Rockwell International of Seal Beach, which has key facilities in Canoga Park and Downey, sells its aerospace and defense divisions to Boeing.2000: Litton Industries, based in Woodland Hills, is purchased by Northrop Grumman Corp.2010: Northrop Grumman, based in Century City, announces that it will be moving its headquarters to Washington, D.C.-- Scott J. Wilson