A Slovenian air force Pilatus PC-9 aircraft flies in support of U.S. joint terminal attack controllers during Exercise Rock Proof V at Pocek Range in Postonja, Slovenia, Oct. 21, 2015. Exercise Rock Proof V is a bilateral training exercise between U.S. Soldiers assigned to 173rd Airborne Brigade and the Slovenian Armed Forces, focused on small-unit tactics and building interoperability between allied forces. (U.S. Army photo by Visual Information Specialist Paolo Bovo/Released)