William McArthur, born July 26, 1951 in Laurinburg, North Carolina, is a veteran of three space shuttle missions and one trip to the International Space Station.
His first mission was aboard Columbia (STS-58) as mission specialist October-November 1993. During the flight, he tested the Lower Body Negative Pressure device as a countermeasure for the detrimental effects of microgravity.
His second mission was aboard Atlantis (STS-74) as mission specialist in November 1995. He inspected spacesuits that would be needed in case an EVA would be needed. It wasn't.
McArthur's third flight was aboard Discovery (STS-92) as mission specialist in October 2000. He performed two EVAs during the mission with fellow astronaut Leroy Chiao for a total time of 14 hours.
His fourth and final trip into space was aboard Soyuz TMA-7 as flight engineer to the ISS in October 2005- April 2006 as part of Expedition 12.
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