Expedition 12 commander William S. McArthur, Jr. (right) and cosmonaut Valery I. Tokarev (left) participate in a training session in the Quest Airlock mockup/trainer at Johnson Space Center's Space Vehicle Mockup Facility. McArthur and Tokarev are wearing training versions of the Extravehicular Mobility Unit space suit.
Expedition 12 commander William S. McArthur, Jr. (right) and cosmonaut Valery I. Tokarev (left) participate in a training session in the Quest Airlock mockup/trainer at Johnson Space Center’s Space Vehicle Mockup Facility. McArthur and Tokarev are wearing training versions of the Extravehicular Mobility Unit space suit. European Space Agency Astronaut Thomas Reiter of Germany assisted the crewmembers.Image Credit: NASA