S84-26244 (31 Jan 1984) --- Astronauts Vance D. Brand, foreground, and Ronald E. McNair, of NASA's STS-41B Space Shuttle Challenger crew, prepare to climb into a T-38 jet aircraft readied for takeoff to Florida and the Kennedy Space Center (KSC). Brand is making his third Spaceflight, including his second as a Shuttle flight crew commander. McNair, mission specialist, will be making his first trip into space. Launch for STS-41B is scheduled for 8 a.m. (EST), February 3, 1984. This photo was taken by Otis Imboden.