Paratroopers from 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade and Soldiers from the Slovenian army's 10th Infantry Regt., 1st Brigade, participate in a sniper range at Pocek Range in Postonja, Slovenia, Dec. 3, 2014. Rock Proof is a series of exercises between 2nd Battalion and the Slovenian Armed Forces 1st Brigade, focused on small-unit tactics and building interoperability between allied forces. (U.S. Army photo by Visual Information Specialist Paolo Bovo/Released)