HTV-2

Hypersonic Technology Vehicle 2 (HTV-2) was a crewless, experimental hypersonic glide vehicle rocket glider developed as part of the DARPA Falcon Project capable of flying at 13,000 mph.

FALCON (Force Application and Launch from CONtinental United States)

The prototype Hypersonic Technology Vehicle 2 (HTV-2) first flew on 22 April 2010; the second test flew 11 August 2011. Both flights ended prematurely.

HTV-3X: Blackswift was canceled.