STS-55

Space ShuttleSpace Shuttle Columbia lifts off on a mission lasting nearly ten days, carrying the Spacelab laboratory module in its cargo bay. This flight, Spacelab D-2, includes medical and material experiments, with one experiment controlled by an Apple Macintosh computer carried into orbit. Amateur radio messages are exchanged with the crew of the Mir space station. Aboard Columbia for her 14th flight are Commander Steven Nagel, Pilot Terence Henricks, mission specialists Jerry Ross, Charles Precourt and Bernard Harris Jr., and payload specialists Ulrich Walter and Hans Schlegel.