A paratrooper from the U.S. Army's 173rd Infantry Brigade Combat Team looks at the sniper rifle of a Polish soldier as they participate in training exercises with the Polish 6 Airborne Brigade' soldiers at the Land Forces Training Centre in Oleszno near Drawsko Pomorskie, north west Poland, May 1, 2014. American ground troops who arrived in Poland last week took part in military exercises with Polish parachuters as a part of NATO cooperation. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY POLITICS)