Thursday's test flight of the Falcon HTV-2 ended with signals lost and a crash landing into the Pacific – but not before it sent engineers half an hour of flight data. The Pentagon hopes the design will allow a non-nuclear response to threats anywhere in the world, within one hour.
Two experimental US missile defense satellites have passed a series of vital tests in space, successfully spotting three missile launches and relaying their data back to Earth.
SpaceX's Falcon 9 rocket could eventually be modified to carry people to space.
The Falcon 9 rocket, built by Space Exploration Technologies, could make its first test as soon as May 28. It could be modified to carry people into orbit, company officials said.