Experimental Rocket Plane: LAMLS and MS of the X-15, an hypersonic research craft, being carried aloft by a Boeing Stratofortress. Various shots of interior of control station, of tracking set up: dish scanners, helical trackers. Sequence of drawings showing the X-15 dropping from mother plane, accelerating, climbing, coasting against a background of stars, descending, gliding over mountains. HAMLS of X-15 landing in the desert.