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This single photo includes five significant pieces of military aviation history that now live in close quarters in the National Museum of the US Air Force. Can you name them all?
Lockheed Have Blue Radar Cross Section Model - this model was built for radar testing in 1975-76. Two full scale prototypes followed (both crashed and were buried in the desert). The effort led to the F-117 Nighthawk.
Northrop Tacit Blue - The only one built. In the 1980s, this prototype was built to validate radar cross sections of curved surfaces. It influenced B2 design. Notice the thin exhaust opening at the rear. There are only intakes on the roof - no other air inlet openings.
Lockheed YF-12 - The only surviving example of three built. The YF-12 came before the SR-71 Blackbird. It was armed with missiles and built to intercept high altitude supersonic bombers.
North American XB-70 Valkyrie - The only one in existence (one crashed and another was halted while under construction). High altitude Mach 3 nuclear strike bomber.
Grumman X-29A - one of two built, it is the world's first forward swept aircraft to fly supersonically.
