HTV-3X Scramjet

If it works, the HTV-3X will be the first reusable scramjet-powered plane. It will be able to take off from a runway, fly at speeds of up to Mach 6, land safely, and then do it again.

Scramjets, and even the HTV-3X, are not new news — but this rendering featured recently in Popular Science is straight creamy delicious.