JSC2000-07406 (1 December 2000) --- Astronaut Umberto Guidoni (left), STS-100 mission specialist representing the European Space Agency (ESA), views a closed-circuit televising of an underwater space walk simulation performed by two crew mates. The simulation of the scheduled spring 2001 space walk took place at the Neutral Buoyancy Laboratory (NBL) at the Sonny Carter Training Facility. Astronaut Jeffrey S. Ashby, pilot, is at center. Astronauts Scott E. Parazynski of the NASA-Johnson Space Center and Chris A. Hadfield of the Canadian Space Agency (CSA), both mission specialists and both equipped with training versions of the extravehicular mobility unit (EMU) space suits, were in the water at the time.