Astronaut David M. Walker, mission commander, stands near the hatch for one of JSC's high fidelity Shuttle trainers prior to a procedures rehearsal of launch and entry phases of the STS-69 mission scheduled aboard the Space Shuttle Endeavour. NASA's Troy Stewart of the Crew and Thermal Systems Division of JSC's Engineering Directorate checks the readiness of Walker's training version of the partial pressure launch and entry space suit. The training session took place in the System Integration Facility's Crew Compartment Trainer (CCT).