S83-30214 (7 April 1983) --- Astronaut F. Story Musgrave, STS-6 mission specialist, suspends himself midway between the starboard and port slide wire systems to evaluate the pull strength of the reel-in safety tether while astronaut Donald H. Peterson, the flight?s other mission specialist, busies himself along the port side at right edge of frame. This photograph was taken by astronaut Karol J. Bobko, pilot, from the aft window of the Earth-orbiting Challenger?s flight deck. The successful EVA occurred on April 7, 1983, on day four of the five-day flight. The gold-foil protected object is the airborne support equipment (ASE) for the now vacated inertial upper stage (IUS) which aided in the deployment of the tracking and data relay satellite (TDRS) on the first day of the mission. Astronaut Paul J. Weitz, crew commander, was in charge of the Challenger during these operations. The white background is made up mostly of clouds over Earth. Photo credit: NASA