ISS012-E-18233 (14 Feb. 2006) --- Astronaut William S. (Bill) McArthur (right), Expedition 12 commander and NASA space station science officer, and cosmonaut Valery I. Tokarev, flight engineer representing Russia's Federal Space Agency, work with the Treadmill Vibration Isolation System (TVIS) during in-flight maintenance (IFM) in the Zvezda Service Module of the International Space Station.