(SMP), and a long term hypersonic cruise aircraft named the Hypersonic Cruise Vehicle (HCV). This two-part program was announced in 2003 and continued into 2006.

Current research under Falcon project is centered on the flight tests of boost-glide technological demonstrators HTV-1 and HTV-2 for the development of the X-41 Common Aero Vehicle (CAV) and HTV-3 for the Hypersonic Cruise Vehicle (HCV). The technological demonstrator Hypersonic Technology Vehicle 2 (HTV-2) first flew on