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Preparations for EVAs (Extra-Vehicular Activities or spacewalks) we made in the airlock. EVA suits, weighing 124.7kg (275 pounds) each, were stored here for launch. Prior to the spacewalk, astronauts would sleep out overnight in the airlock at a lower air pressure than the Crew Module, helping flush their body of nitrogen to prevent “the bends”. They exited the airlock into the Payload Bay through this hatch.
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