Crew walkout, Space Shuttle  Atlantis, STS 101Mission, May 2000, Kennedy Space Center, Titusville, FL.  Crew:  Commander James D. Halsell Jr., Pilot Scott J. &quot;Doc&quot; Horowitz, Mission Specialists Mary Ellen Weber, Jeffrey N. Williams, James S. Voss, Susan J. Helms and Yury Vladimirovich Usachev.  (Photo by Brian Cleary/bcpix.com)