A U.S. Army paratrooper assigned to Battle Company, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade Combat Team rushes to a firing position during a live-fire exercise as part of exercise Rock Proof in Postojna, Slovenia, May 6, 2014.
Rock Proof is a bilateral, battalion-level field and tactical training exercise designed to bolster interoperability between U.S. and Slovenian forces. (DoD photo by Staff Sgt. Pablo N. Piedra, U.S. Army/Released). Original public domain image from Flickr