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The STS-78 crew led by Mission Commander Terence T. Henricks, at far right, walk out of the Operations and Checkout Building en route to Launch Pad 39B as part of the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. Dressed in their orange launch and entry suits, other crew members are, from rear; Pilot Kevin R. Kregel; Payload Specialist Jean-Jacques Favier from the French Space Agency (waving) and Robert Brent Thirsk from the Canadian Space Agency, to Favier's right, Missions Specialists Charles E. Brady, Jr., at left, and Richard M. Linnehan; and Payload Commander Susan J. Helms, in front. The primary payload of the STS-78 mission aboard the Space Shuttle Columbia is the Life and Microgravity Spacelab (LMS). The targeted liftoff date is June 20.