STS043-37-012 (2-11 Aug 1991) --- Three STS-43 astronauts are busy at work onboard the earth-orbiting space shuttle Atlantis. Astronaut Shannon W. Lucid is pictured performing one of several tests on Computer hardware with space station applications in mind. Sharing the aft flight deck with Lucid are Michael A. Baker (left), pilot and John E. Blaha, mission commander.