Fort Worth, Texas, 31 March 2012. Lockheed Martin [NYSE: LMT] has been awarded a $664 million modification contract to perform sustainment activities for the F-22 Raptor fleet for 2012. The fleet, which consists of 187 jets, had its final jet built in December of 2011. No future procurements of F-22 aircraft are expected. The F-22 raptor is a fighter aircraft that uses stealth technology. It is capable of conducting electronic warfare and performing air-to-air and air-to-ground combat. Work for this contract will be performed at Marietta, Ga.; Fort Worth, Texas; Palmdale, Calif.; and Seattle, Wash and is to be completed by the end of 2012.