STS-83

STS-83 was the first flight of NASA's Microgravity Science Laboratory 1 aboard Space Shuttle Columbia. The mission launched from Kennedy Space Center Launch Complex 39A on April 4, 1997 with James Halsell, Susan Still, Janice Voss, Donald Thomas, Michael Gernhardt, Roger Crouch, and Gregory Linteris. The mission was planned as an intensive Spacelab research flight, but NASA ended it early after Columbia developed a problem in one of its fuel-cell power units. The crew still completed a limited set of microgravity experiments before landing at Kennedy Space Center on April 8, 1997. NASA decided shortly after landing to repeat the mission in full. That reflight, first considered as STS-83R and then designated STS-94, returned the same vehicle, crew, and MSL-1 payload to orbit in July 1997.