An experimental unmanned aircraft developed for the U.S. Air Force has flown at more than five times the speed of sound in a test off California.

Technology - Engineering

May 03, 2013 4.8 / 5 (27) 14

Virgin Galactic's SpaceShipTwo has made its first powered flight, breaking the sound barrier in a test over the Mojave Desert that moves the company closer to its goal of flying paying passengers on brief ...

Space & Earth - Space Exploration

Apr 29, 2013 4.9 / 5 (16) 2