This view of the aft portion of the space shuttle Atlantis, including the three main engines, was provided by the Expedition 21 crew during a survey of the approaching vehicle prior to docking with the International Space Station. As part of the survey and every mission's activities, Atlantis performed a back-flip for the rendezvous pitch maneuver. The image was photographed with a digital still camera, using a 400mm lens at a distance of about 600 feet (180 meters).
