Mr. Walz had a distinguished career as both a NASA astronaut and as an Air Force officer. Mr. Walz was selected as a NASA astronaut candidate in 1990 and for the next 12 years gained extensive space flight experience. Mr. Walz flew as a crew member aboard three Space Shuttle missions and served as an ISS crew member in a separate mission, enabling him to log a total of 231 days in space. His experience aboard the Space Shuttle includes serving as a mission specialist on STS-51 in 1993; as the Shuttle’s flight engineer on STS-65 in 1994; and as a mission specialist on the STS-79 in 1996. During 2001-2002, he served 196 days in space as Expedition 4 flight engineer aboard the ISS. During the STS-51 mission, Mr. Walz deployed the U.S. Advanced Communications Technology Satellite (ACTS) and its Orbital-provided Transfer Orbit Stage (TOS) and conducted his first spacewalk. During Expedition 4, Mr. Walz and his U.S. and Russian colleagues performed flight tests of ISS hardware, conducted internal and external maintenance and outfitting tasks, operated the Space Station Robotic Manipulator System, and conducted numerous experiments in a variety of scientific disciplines. Mr. Walz also completed two spacewalks from the ISS totaling almost 12 hours in both Russian and U.S. spacesuits.
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