9/11 artifact
A steel beam recovered from the World Trade Center arrived Nov. 19, 2010, at Cheyenne Mountain Air Force Station, Colo. The beam will be incorporated into a permanent memorial on Cheyenne Mountain AFS, and is expected to be officially unveiled in September 2011. Col. Rusty Wilson, the 721st Mission Support Group commander, invited a team of engineering students from the University of Colorado at Colorado Springs to design the memorial. (U.S. Air Force photo/Larry Hulst)