JSC2000-E-23342 (26 September 2000) --- Astronauts Carl E. Walz (left) and Daniel W. Bursch, both Expedition Four flight engineers, and cosmonaut Yuri I. Onufrienko, mission commander, pause for an informal crew portrait prior to a mission training session in the Space Vehicle Mockup Facility at the Johnson Space Center (JSC). The crew members are attired in training versions of the shuttle launch and entry garment. Onufrienko represents Rosaviakosmos.