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Seen at Marshall Space Center building 4708 in the high-bay clean room, astronauts Nicholas Patrick (right) and Robert Behnken, both STS-130 mission specialists, accompanied by Eric Howell, Boeing Huntsville Chief Engineer for ISS, handle ammonia hoses to be installed during mission STS-130. The hoses are at 500 pounds per square inch pressure (psi) to give them a feel for how stiff the hoses would be at 500 psi if they had to handle them under pressure on orbit.