Mary Duffman holds her daughter, Sophia ,3, as she touches the beam of the 9/11 memorial installed outside of NORAD, NORTHCOM headquarters Tuesday afternoon, May 18,2010. Mary Duffman’s husband, Tech. Sgt. Scott Duffman was killed in Afghanistan while serving in the Air Force in 2007. The beam from the World Trade Tower was installed in a pentagon-shaped base with surface dirt from the crash site of flight 93 near Shanksville, PA, and pointed northeast towards NY.