The U.S. military’s secretive X-37B robot spaceplane blasted off from Florida on Thursday night on its seventh mission, the first launched atop a SpaceX Falcon Heavy rocket capable of delivering it to a higher orbit than ever before. The Falcon Heavy, composed of three liquid-fueled rocket cores strapped together, roared off its launch pad from NASA’s Kennedy Space Center at Cape Canaveral in a spectacular liftoff carried live on a SpaceX webcast.
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