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June 6, 2011
Astronauts Susan L. Still (left), pilot; and Janice E. Voss, payload commander, review an Inflight Maintenance (IFM) procedure during one the daily planning sessions in the Spacelab Science Module in support of the Microgravity Science Laboratory (MSL-1) mission. Payload specialist Gregory T. Linteris works at a lap top computer in the background. MSL-1 utilized a two-shift operation for the entire sixteen day duration. During the times when the shifts overlapped, the on-duty team briefed the incoming shift crew members on alterations to the timeline that occurred during the previous 12-hour period. Since the crew's activities were sometimes diverted from the original plan for various reasons, teams of ground planners also alter each 12-hour shift throughout the entire mission. Although the duties of the pilot and commander are generally directed toward operations of the Space Shuttle, they frequently are called on to assist the payload commander and the other mission specialists, as well as the payload specialists, when the need surfaces.

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