STS046-24-025 (31 July-8 Aug. 1992) --- Astronaut Andrew M. Allen, STS-46 pilot, exercises on the bicycle ergometer device on the flight deck of the Space Shuttle Atlantis as it makes one of its 127 total orbits for the eight-day mission. Allen, equipped with sensors for monitoring his biological systems during the run, was joined by four other NASA astronauts and two European scientists on the mission.