Astronaut Dave Williams, STS-118 mission specialist representing the Canadian Space Agency, wears a training spacesuit as he participates in an underwater simulation of extravehicular activity in the Neutral Buoyancy Laboratory near Johnson Space Center.
Astronaut Dave Williams, STS-118 mission specialist representing the Canadian Space Agency, wears a training spacesuit as he participates in an underwater simulation of extravehicular activity in the Neutral Buoyancy Laboratory near Johnson Space Center. SCUBA-equipped divers are in the water to assist Williams in his rehearsal, intended to help prepare him for work on the exterior of the International Space Station.Image credit: NASA