Billionaire Virgin Galactic founder Richard Branson salutes the bravery of test pilots, and vows to find out what caused the crash of his prototype space tourism rocket that killed one crew member and injured another during a news conference in Mojave, Calif., Saturday, Nov. 1, 2014. Virgin Galactic's SpaceShipTwo blew apart about 20 miles (32 kilometers) from the Mojave airfield after being released from a carrier aircraft Friday. (AP Photo/Brian Melley)
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