Spc. Joshua Hutchins and Spc. Ryan Frye thread a Bangalore torpedo through a barrier of concertina wire during a training exercise for combat engineers with the 82nd Airborne Division’s 1st Brigade Combat Team Feb. 23, 2011, at Fort Bragg, N.C. The explosive devices are used to clear a path through the “C-wire” for advancing troops. (U.S. Army photo by Sgt. Michael J. MacLeod)