Live coverage: Proton fires into space with Eutelsat 9B

SpaceX is gearing up for the first commercial launch of its powerful Falcon Heavy rocket as soon as early April with a communications satellite for Arabsat, and the U.S. Air Force hopes the two side boosters from the Arabsat mission can be safely landed and reused for the military’s first Falcon Heavy mission this summer, an exercise officials said will help certify previously-flown hardware for future national security launches.

A SpaceX Falcon 9 rocket lifted off Thursday from NASA’s Kennedy Space Center in Florida with the U.S. Air Force’s X-37B mini-shuttle, an unpiloted orbiting military laboratory. Liftoff occurred at 10 a.m. EDT (1400 GMT), and the Falcon 9’s first stage booster successfully landed at Cape Canaveral a few minutes later.

Four days after a Soyuz ferry craft brought three space station fliers down to a frigid landing in Kazakhstan, three fresh crew members are poised for launch early Tuesday from the Baikonur Cosmodrome to boost the lab’s crew back to six.