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Outside the Operations and Checkout Building, STS-114 Commander Eileen Collins leads the way to the Astrovan that will transport the crew to Launch Pad 39B for a mock launch countdown culminating in a simulated main engine cutoff. In the left row, from front, are Pilot James Kelly and Mission Specialists Wendy Lawrence, Charles Camarda, and Andrew Thomas. In the right row, from front, are Collins and Mission Specialists Soichi Noguchi and Stephen Robinson. Noguchi is with the Japan Aerospace Exploration Agency. The dress rehearsal is part of Terminal Countdown Demonstration Test (TCDT) activities held prior to each Space Shuttle flight. It provides the crew of each mission an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency egress training. STS-114 is the first Return to Flight mission to the International Space Station. The launch window extends July 13 through July 31.