SpaceX poised to launch cargo from historic NASA pad

An unmanned SpaceX spaceship carrying food and equipment to the astronauts living at the International Space Station is poised to blast off from a historic NASA launch pad on Saturday.The Falcon 9 rocket launch of the Dragon cargo ship is scheduled for 10:01 am (1501 GMT) from Cape Canaveral's launchpad 39A, which was built and used for the US space agency's pioneering missions to the moon in the 1960s and 1970s.SpaceX, headed by billionaire internet entrepreneur Elon Musk, negotiated a lease wi