rocket explodes

MOJAVE, Calif. (AP) -- Billionaire Virgin Galactic founder Richard Branson vowed Saturday to find out what caused the crash of his prototype space tourism rocket, killing one crew member and injuring another, but sounded a cautious note about any move to quickly push the project forward.

MOJAVE, Calif. (AP) -- Federal accident investigators are headed to a desert crash site where a winged spaceship designed to give wealthy tourists a high-altitude view of Earth broke up during a test flight, killing one pilot and badly injuring another.

An unmanned commercial supply ship bound for the International Space Station exploded moments after liftoff Tuesday evening