Virgin Spaceship Crash Raises Questions

Plans to fly tourists to the edge of space could be delayed after Friday's crash of Virgin Galactic's SpaceShipTwo during a manned test flight.  It is the second explosion of a U.S. commercial spacecraft this week. The two disasters raise questions about the future of commercial space flights in the United States. Television footage taken from a helicopter shows the wreckage of the spacecraft scattered in California's Mojave Desert.  Local authorities say the...

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