It turns out that tearing through the atmosphere at 20 times the speed of sound is bad for the skin, even if you’re a super high-tech aircraft developed by the government’s best engineers at its far-out research agency.
DARPA, the Defense Advanced Research Project Agency, has made public its best guess about what might have caused its unmanned arrowhead-shaped Hypersonic Technology Vehicle (HTV-2) to suddenly lose contact and crash in the Pacific just a few minutes after slicing through the sky at Mach 20 last August: it was going so fast its skin peeled off .... Read more at http://abcnews.go.com
