ISS004-E-9970 (10 April 2002) --- Astronauts Rex J. Walheim (bottom left), Jerry L. Ross, both STS-110 mission specialists, Carl E. Walz (top left) and Michael J. Bloomfield, Expedition Four flight engineer and STS-110 mission commander, respectively, gather for a group photo in the Zvezda Service Module on the International Space Station (ISS).