Williams and Vinogradov monitor data in the SM of the Progress 21 approach during Expedition 13

ISS013-E-10231 (26 April 2006) --- Astronaut Jeffrey N. Williams (foreground), Expedition 13 NASA space station science officer and flight engineer, and cosmonaut Pavel V. Vinogradov, commander representing Russia's Federal Space Agency, monitor data in the Zvezda Service Module as Progress 21 supply vehicle approaches the International Space Station.