Machine Gunner A U.S. soldier shoots targets with an M2 machine gun during exercise Rock Proof V at Bac Range, Postonja, Slovenia, Oct. 15, 2015. The 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 SHARE: Download: Full Size (2.74 MB) Tags: Photo Essays, Exercise Rock Proof V, Slovenia soldiers, Postonja, Slovenia, Paolo Bovo, live-fire, U.S. Paratroopers, All images Credit: Paolo Bovo VIRIN: 151015-A-JM436-313.JPG Photo Gallery