The STS-104 crew exits out of the Operations and Checkout Building on their way to Launch Pad 39B.

The STS-104 crew exits out of the Operations and Checkout Building on their way to Launch Pad 39B. Leading are Commander Steven W. Lindsey (left) and Pilot Charles O. Hobaugh. In the center is Mission Specialist Janet Lynn Kavandi. Following her are Mission Specialists Michael L. Gernhardt (left) and James F. Reilly. . The launch of Space Shuttle Atlantis on mission STS-104 is targeted for 5:04 a.m., July 12, from Launch Pad 39B. The primary payload on the mission is the joint airlock module, which will be added to the International Space Station. The airlock will be the primary path for Space Station spacewalk entry and departure for U.S. spacesuits, and will also support the Russian Orlan spacesuit for EVA activity. D1X NIKON Photo by S. Andrews