An Iraqi Army tank clears an obstacle while an Iraqi Army Soldier the 72nd Brigade, 15th Iraqi Army Division, looks on at Camp Taji, Iraq, Sunday March 22, 2015. Iraqi soldiers with the 72nd Brigade, 15th Iraqi Army Division participated in a combined training exercise that included tanks, helicopters, engineers and infantry at the conclusion of their three-week advanced training course with U.S. advisers. There are currently 4,800 Iraqi troops in training at four building partner capacity sites in Iraq, with 3,000 of those troops entering training three weeks ago. (U.S. Army photo by Sgt. Cody Quinn, CJTF-OIR Public Affairs )