With its twin solid rocket boosters and three main engines churning at seven million pounds of thrust, the Space Shuttle Atlantis thunders skyward from Launch Pad 39A. Liftoff of Mission STS-45 occurred at 8:13:40 a.m. EST, March 24, 1992. STS-45 carried the first Atmospheric Laboratory for Applications and Science (ATLAS-1) experiments, placed on Spacelab pallets mounted in the orbiter's payload bay. The non-deployable payload, equipped with 12 instruments from the United States, France, Germany, Belgium, Switzerland, the Netherlands and Japan, conducted studies in atmospheric chemistry, solar radiation, space plasma physics and ultraviolet astronomy.