More recently the AFTC has been part of the anti-satellite missile and Joint Direct Attack Munition development. Additionally, the center has played a key role in the development of the Air Force's X-35A and X-32A prototypes for the Joint Strike Fighter program, both making their first flights in late 2000. The resulting F-35 Lightning II is being built in three versions for the Air Force, the United States Navy and the United States Marine Corps, as well as multiple allied military partners. NASA maintains its Armstrong Flight Research Center on Edwards and partners with the AFFTC on aircraft development.