US military's secretive X-37B robot spaceplane launched atop SpaceX Falcon Heavy rocket | 5 key facts to know The X-37B US space drone is about the size of a small bus and resembles a miniature space shuttle. Know all about the mission objectives, US-Sino rivalry in space and more.
US military's secretive X-37B robot spaceplane launched atop SpaceX Falcon Heavy rocket | 5 key facts to know
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