U.S. Army Sgt. 1st Class Charles Palmer, center, looks on as a Vermont National Guardsman places an explosive charge around a door knob during training at the Camp Ethan Allen Training Site in Jericho, Vt., May 11, 2013. Palmer was assigned as an instructor with the 124th Regiment (Regional Training Institute). (U.S. Army photo by 1st Lt. Jeffrey Rivard/Released)