The Orbiter 101 Enterprise separates from the NASA 747 carrier aircraft to begin its first "tail-cone off" unpowered flight over the desert and mountains of Southern California. A T-38 chase plane follows at right in the background. Astronauts Joe H. Engle and Richard H. Truly controlled the Orbiter on its two-minute, 34-second unpowered mission on this, the fourth of five Approach and Landing Tests (ALT) with free flight phases, from Dryden Flight Research Center (DFRC).
NASA Photo ID: S77-28931
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