A piece of debris is seen near the crash site of Virgin Galactic's SpaceShipTwo near Cantil, California November 1, 2014. Virgin Galactic founder Richard Branson said on Saturday he was working with U.S. authorities to determine what caused a passenger spaceship being developed by his space tourism company to crash in California, killing one pilot and injuring the other. REUTERS/Lucy Nicholson (UNITED STATES - Tags: DISASTER TRANSPORT BUSINESS)