U.S. Army Sgt. Desmond Herring, lying down, conducts preflight checks on an RQ7B unmanned aircraft system during Exercise Rock Proof V at Aeroclub Postonja, Slovenia, Oct. 20, 2015. Herring is a U.S. paratrooper assigned to Company D, 54th Brigade Engineer Battalion, 173rd Airborne Brigade. The training exercise, which occurs between U.S. and Slovenian forces, focuses on small-unit tactics and building interoperability between allied forces. U.S. Army photo by Paolo Bovo