Stock Photo - 04/08/1997 __ The Space Shuttle Columbia touches down on Runway 33 at KSC´s Shuttle Landing Facility at 2:33:11 p.m. EDT, April 8, to conclude the Microgravity Science Laboratory_1 MSL_1 mission. At main gear touchdown, the STS_83 mission duration was 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. Mission Commander James D. Halsell, Jr. flew Columbia to a perfect landing with help from Pilot Susan L. Still. Other crew members are Payload Commander Janice E. Voss, Mission Specialists Michael L. Gernhardt and Donald A. Thomas, and Payload Specialists Roger K. Crouch and Gregory T. Linteris. In spite of the abbreviated flight, the crew was able to perform MSL_1 experiments. The Spacelab_module_based experiments were used to test some of the hardware, facilities and procedures that are planned for use on the International Space Station and to conduct combustion, protein crystal growth and materials processing investigations