U.S. soldiers shoot targets with the M4 carbine rifle during exercise Rock Proof V at Bac Range, Postonja, Slovenia, Oct. 15, 2015. The paratrooper soldiers are assigned to Company C, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade, stationed in Vicenza, Italy. Exercise Rock Proof V is a training exercise between U.S. soldiers and the Slovenian armed forces, focusing on small-unit tactics and building interoperability between these allied forces. U.S. Army photo by Paolo Bovo