Paratroopers from Company C, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade engage targets with the M2 machine gun during a live-fire exercise as part of Exercise Rock Proof V at Bac Range in Postonja, Slovenia, Oct. 15, 2015. Exercise Rock Proof V is a bilateral training exercise between U.S. Soldiers assigned to 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade and the Slovenian Armed Forces, focused on small-unit tactics and building interoperability between allied forces. (U.S. Army photo by Visual Information Specialist Paolo Bovo)