STS008-04-098 (30 Aug-5 Sept 1983) --- A portion of the Canadian-built remote manipulator system (RMS) arm is centered in this frame, photographed through a window on the flight deck of the Earth-orbiting Space Shuttle Challenger. The arm was getting a workout with the payload flight test article (PFTA), which joined the five-member astronaut crew on the six-day mission in space.