ChallengerSpace Shuttle Challenger lifts off on a week-long mission to perform experiments in the cargo-bay-mounted Spacelab laboratory module. Aboard Challenger for the Spacelab 3 flight are Commander Robert Overmyer, Pilot Frederick Gregory, mission specialists Don Lind, Norm Thagard, and William Thornton, and payload specialists Lodewijk van den Berg and Taylor Wang. Following the landing gear damage experienced by Discovery on its last flight, Challenger makes its landing at Edwards Air Force Base.