S77-28210 (13 Sept 1977) --- Astronauts Joe H. Engle (face down), commander, and Richard H. Truly (face partially obscured by Engle), pilot, are greeted by Rockwell technicians following egress from the shuttle Orbiter 101 "Enterprise." They had just completed a five-minute, 31-second unpowered free flight in the "Enterprise," the second of a series of such flights, conducted on September 13, 1977, at the Dryden Flight Research Center (DFRC) and Edwards Air Force Base.