One of three X-15 rocket planes from North American rests on Rogers Dry Lake, Calif. in September 1961, following a mission. The B-52 launch aircraft flies overhead. (Courtesy NASA photo)
One of three X-15 rocket planes from North American rests on Rogers Dry Lake, Calif. in September 1961, following a mission. The B-52 launch aircraft flies overhead. (Courtesy NASA photo)