U.S. Army Pfc. Darren P. Ziolkowski, a paratrooper with Bravo Company, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade Combat Team, provides security after reacting to indirect fire May 4, 2014, during a situational training exercise as part of Rock Proof in Postojna, Slovenia.
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