Back-blast Area A paratrooper checks the back-blast area before firing an AT4 anti-tank weapon training aid during a live-fire exercise at Fort Bragg, N.C., April 13, 2016. Army photo by Staff Sgt. Jason Hull SHARE: Download: Full Size (3.31 MB) Tags: Army Credit: Staff Sgt. Jason Hull VIRIN: 160413-A-DP764-003A.JPG Photo Gallery