The U.S. Space Force's secretive X-37B space plane is poised to launch to orbit once again. The X-37B is slated to lift off atop a SpaceX Falcon 9 rocket on Aug. 21 from NASA's Kennedy Space Center in ...

SpaceX launches a Boeing-made X-37B space plane on a U.S. Space Force mission with its return date undisclosed. Photo: Jennifer Briggs/Zuma Press A Pentagon spaceplane called X-37B zoomed into orbit ...