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The Space Shuttle Orbiter Columbia glides in for a touchdown on Runway 33 at KSC's Shuttle Landing Facility that will conclude the Microgravity Science Laboratory-1 (MSL-1) mission. Columbia was scheduled to touch down at 2:33 p.m. EDT, April 8. The Vehicle Assembly Building (VAB) is to the right, while the Mate/Demate Device (MDD) is to the left. A NASA Shuttle Training Aircraft (STA) that acts as a chase plane during the landings passes by overhead. With Columbia's on-time main gear touchdown, the STS-83 mission duration will be 3 days, 23 hours, 12 minutes. The planned 16-day mission was cut short by a faulty fuel cell. This is only the third time in Shuttle program history that an orbiter was brought home early due to mechanical problems. This was also the 36th KSC landing since the program began in 1981.