U.S. Army paratroopers show Slovenian soldiers how to conduct pre-flight checks on an RQ7B Shadow unmanned aircraft system during Exercise Rock Sokol at Aeroclub Postonja in Slovenia, March 2, 2016. The paratroopers are assigned to the 54th Brigade Engineer Battalion, 173rd Airborne Brigade. Exercise Rock Sokol is a bilateral training exercise between the U.S. Army 173rd Airborne Brigade and Slovenian armed forces focused on small-unit tactics and building on previous lessons learned, forging bonds and enhancing readiness between allied forces. Army photo by Paolo Bovo