 Approximately half of the operation moved to San Jose, California, and the other half set up offices at the former McClellan Air Force Base in Sacramento, California.In December 2002, TRW, including ESL, was acquired by Northrop Grumman Corporation.Northrop Grumman has one of the largest intelligence analysis capabilities in the U. S. and is a leader in developing computer architectures and multisource data integration tools.