JSC2002-E-39744 (26 Sept. 2002) --- Astronaut Steven G. MacLean, STS-115 mission specialist representing the Canadian Space Agency, waves as he is submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. MacLean is wearing a training version of the Extravehicular Mobility Unit (EMU) space suit.
Photographer James Blair