STS-50 "Columbia" (June 25, 1992 - July 9, 1992) launched and landed at the Kennedy Space Center in Florida. STS-50 was the first flight of the United States Microgravity Laboratory and the first Extended Duration Orbiter flight. Over a two-week period, the crew conducted scientific experiments involving crystal growth, fluid physics, fluid dynamics, biological science, and combustion science. Mission objectives were accomplished in 221 orbits of the Earth, traveling 5.7 million miles in 331 hours 30 seconds and 4 minutes in space.