Live coverage of the countdown and launch of a Proton rocket and the Inmarsat 5 F3 mobile communications satellite. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
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Watch replay of Falcon 9 launch as seen from the press site
A SpaceX Falcon 9 rocket, powered by a previously-flown booster, lifts off from launch pad 39A at NASA’s Kennedy Space Center in Florida at 6:27 p.m. EDT (2227 GMT) on March 30, 2017, carrying the SES 10 communications satellite. The launch marked the first time SpaceX has reused the first stage of one of its Falcon 9 rockets.