Video: NASA's unmanned X-43 creates world record at nearly 5,000 mph | Daily Mail Online

Reveal Universe on Instagram: "The X-43A was an unmanned experimental aircraft built by NASA under the Hyper-X program to demonstrate scramjet technology in real flight. It was designed for hypersonic research and focused on air-breathing engine performance at extreme speeds. A B-52 aircraft carried it to high altitude, where a Pegasus booster accelerated it to the conditions needed for scramjet testing. After separation, the X-43A used its scramjet engine, which burned hydrogen fuel using incom

X-43: NASA Decided to 'End' This Mach 9.64 Gamechanger Hypersonic Plane

The Fastest Fighter Jet in History: The NASA X-43