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JSC2004-E-34990 (9 August 2004) --- Astronaut Leroy Chiao, Expedition 10 commander and NASA ISS science officer, dons a training version of the Extravehicular Mobility Unit (EMU) spacesuit prior to being submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC) to begin a spacewalk rehearsal. Khang Lan (left) and Letti Castillo, both with United Space Alliance (USA), assisted Chiao.
