91-4003/FF F-22A USAF. The third of nine F-22s built for EMD (Engineering, Manufacture and Development) testing. Assigned to the 411FLTS/412TW (ED) at Edwards AFB, after making its first flight on 6th March 2000, it was the only F-22 block 2 built. Its final flight was on 28th September 2004, after the airframe was overstressed during tests with two external tanks. Control was lost after it passed through the wake of an F-16, when the maximum permitted g-force of 7.3g was exceeded, climbing to 11.7g. Flight control software was found to be the problem, and although the aircraft landed safely, it never flew again. Arriving here in January 2007, it was restored into 1FW (Langley AFB) markings, before going on display a year later. Above is the Boeing Bird of Prey stealth technology demonstrator, which made around 39 flights at Groom Lake between 1996-1999. Being an internal project, it was never given an X-plane designation, and was later revealed in 2002, when it was donated to the museum.