A paratrooper from the 173rd Infantry Brigade Combat

A paratrooper from the 173rd Infantry Brigade Combat Team (Airborne) throws a grenade during live grenade training at a Drawsko-Pomorskie training area, June 4, 2014. Last month, the U.S. Army paratroopers began unscheduled training with allies in Poland, Estonia, Latvia and Lithuania to increase interoperability between the nations. (U.S. Army National Guard photo by Spc. Lisa Vines, 382nd Public Affairs Detachment/Released)