As seen through a night-vision device, a paratrooper conducts a radio check during a night live-fire exercise as part of Exercise Rock Sokol at Pocek Range in Postonja, Slovenia, March 9, 2016. The paratroopers are assigned to the 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade. Exercise Rock Sokol is a bilateral training exercise between the U.S. Army 173rd Airborne Brigade and Slovenian armed forces that's focused on small-unit tactics and building on previous lessons learned, forging the bonds and enhancing readiness between allied forces. Army photo by Paolo Bovo