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Cosmonaut Yuri I. Onufrienko (left), Expedition Four mission commander, and astronauts Daniel W. Bursch and Carl E. Walz, both flight engineers, are about to begin 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