Last summer, the Pentagon's Falcon HTV-2 glider—which the Air Force says can fly from New York to LA in under 12 minutes, disappeared. Nobody knew why! Now we know why: it went so fast it ripped itself apart.
I don't know what the hell is going on with the Falcon Hypersonic Test Vehicle 2, but the Air Force just lost it again. Last year, the first Falcon vanished over the Pacific Ocean, leaving absolutely no trace.