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The STS-92 crew greets cheering onlookers as they exit the Operations and Checkout Building for the trip to Launch Pad 39A and liftoff of Space Shuttle Discovery. In rows of two, starting at front, are Pilot Pamela Ann Melroy and Commander Brian Duffy; Mission Specialists Leroy Chiao, Peter J.K. “Jeff” Wisoff; Koichi Wakata, William S. McArthur Jr.; and Michael E. Lopez-Alegria taking up the rear. . This launch is the fourth for Duffy and Wisoff, the third for Chiao and McArthur, second for Wakata and Lopez-Alegria, and first for Melroy. During the 11-day mission to the International Space Station, four extravehicular activities (EVAs), or spacewalks, are planned for construction. The payload includes the Integrated Truss Structure Z-1 and the third Pressurized Mating Adapter. The Z-1 truss is the first of 10 that will become the backbone of the Space Station, eventually stretching the length of a football field. PMA-3 will provide a Shuttle docking port for solar array installation on the sixth Station flight and Lab installation on the seventh Station flight. Launch is scheduled for 7:17 p.m. EDT. Discovery’s landing is expected Oct. 22 at 2:10 p.m. EDT