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Members of the flight crew pose in the Microgravity Science Laboratory 1 (MSL-1) Spacelab Module during the Crew Equipment Interface Test (CEIT) for this payload in the Operations and Checkout Building, at the Kennedy Space Center (KSC). They are astronauts (from the left): Janice E. Voss, payload commander; Paul D. Ronney, alternate payload specialist; Gregory T. Linteris and Roger K. Crouch, payload specialists; Michael L. Gernhardt, mission specialist; and James D. Halsell, Jr., commander. During the scheduled 16-day mission, the MSL-1 will be used to test some of the hardware, facilities and procedures that are planned for use on the International Space Station (ISS).