JSC2000-07400 (1 Dec. 2000) --- Both attired in training versions of the Extravehicular Mobility Unit (EMU) spacesuit, astronauts Scott E. Parazynski (left) and Chris A. Hadfield stand on a platform that will ease the two STS-100 mission specialists into a giant pool of water at the Neutral Buoyancy Laboratory (NBL). Minutes later, the two were in a neutrally buoyant state beneath the surface rehearsing spacewalk duties scheduled for next year's visit to the International Space Station (ISS). Hadfield represents the Canadian Space Agency (CSA).