JSC2000-07072 (23 October 2000) --- Equipped with mockup tools and attached to a training version of the shuttle's remote manipulator system (RMS)robotic arm, astronaut Marc Garneau simulates a space walk task in the Neutral Buoyancy Laboratory (NBL). Garneau, an STS-97 mission specialist representing the Canadian Space Agency (CSA), has been assigned an alternate's role for extravehicular activity (EVA) on the
ISS 4a mission. The prime EVA crew is composed of astronauts Joseph R. Tanner
and Carlos I. Noriega, who are expected to share three different days of space
walks during the December mission.