Space ShuttleSpace Shuttle Atlantis lifts off on a seven-day mission of crucial importance to plans for a future space station. In addition to launching three satellites (Mexico’s MORELOS-B, RCA’s SATCOM KU-2 and AUSSAT-2 for Australia), two spacewalks in excess of five hours each are conducted, each one testing a different method of erecting large truss structures in space. Atlantis’ crew for this mission consists of Commander Brewster Shaw, Pilot Bryan O’Connor, mission specialists Mary Cleave, Sherwood Spring, Jerry Ross and payload specialists Rodolfo Neri Vela and Charles Walker.