Expedition Four flight engineer prior to a mission training session in the Space Vehicle Mockup Facility.

Astronaut Carl E. Walz (left), Expedition Four flight engineer, and cosmonaut Yuri I. Onufrienko, mission commander representing Rosaviakosmos, don their training versions of the full-pressure launch and entry suit prior to a mission training session in the Space Vehicle Mockup Facility at the Johnson Space Center (JSC). Walz and Onufrienko are assisted by United Space Alliance (USA) suit tech Daniel Palmer.