S77-27512 (12 Aug 1977) --- The Shuttle Orbiter 101 "Enterprise" soars above the NASA 747 carrier aircraft only seconds after separating during the first free flight of the Shuttle Approach and Landing Tests (A More
S77-28136 (13 Sept 1977) --- The Orbiter 101 "Enterprise" is seen separating from the NASA 747 carrier aircraft during the second free flight of the Shuttle Approach and Landing Tests (ALTs) conducted on Septem More