STS-118 Preflight Training with Dave Williams and Richard Mastracchio. SCTF, NBL

JSC2007-E-00789 (4 Jan. 2007) --- Canadian Space Agency astronaut Dafydd R. (Dave) Williams, STS-118 mission specialist, attired in a training version of the Extravehicular Mobility Unit (EMU) spacesuit, awaits a training session in the waters of the Neutral Buoyancy Laboratory (NBL) near Johnson Space Center.