Mk-II Aurora, which is a rocket-powered aircraft, has got approval to fly at unlimited speeds, including supersonic velocity, and up to 80,000 feet altitude. This suborbital spaceplane, developed by Dawn Aerospace,

The Mk-II Aurora is a rocket-powered aircraft, designed to be the first vehicle ever to fly to 100 km altitude, the edge of space, twice in a single day. It is rapidly reusable and low cost, making it well suited for a variety of applications in microgravity, high speed flight research, earth observation, as well as other defence and civil uses.