STS050-S-038 (25 June 1992) --- The Space Shuttle Columbia, NASA's first Extended Duration Orbiter (EDO), lifts off on its way toward a scheduled record 13-day mission in Earth-orbit. Liftoff occurred at 12:12:23:0534 p.m. (EDT) on June 25, 1992. Five NASA astronauts and two scientists/payload specialists are aboard. The seven will divide into two shifts to support United States Microgravity Laboratory (USML) research.