U.S. paratroopers assigned to 2nd Battalion, 503rd Infantry Regiment, 173rd Infantry Brigade Combat Team (Airborne), render medical aid to a simulated casualty while conducting a live fire exercise, during exercise Rock Proof in Postonja, Slovenia, April 30, 2014. Exercise Rock Proof is a two-week long bilateral training exercise between the 173rd IBCT (Airborne) and Slovenian soldiers assigned to the 10th Battalion. . (photo by U.S. Army Spc. Franklin R. Moore / released).