SpaceX launches cargo, but fails to land rocket

SpaceX on Wednesday blasted off its unmanned Dragon cargo ship, loaded with supplies, science experiments and food for the astronauts living at the International Space Station but failed to successfully land its booster afterwards."We have had a great liftoff," said SpaceX commentator John Insprucker, as the Falcon 9 rocket soared into the sunny, blue sky over Cape Canaveral, Florida at 1:16 pm (1816 GMT), carrying 5,600 pounds (2,500 kilograms) of gear.The mission was SpaceX's 16th mission for