SpaceX Falcon Heavy Launches X-37B, a Secretive US Military Spaceplane

SpaceX’s powerful Falcon Heavy rocket lofted a secretive space plane for the US Space Force on Thursday evening from Florida, the first time the rocket was used to send the Boeing Co.-built experimental spacecraft to orbit.

The launch, which lifted off at 8:07 p.m. local time, marked the start of the seventh mission for the Space Force’s secretive spaceplane, the X-37B. Shaped like a…