U.S. paratroopers take part in sky jump "Bayonet Strike" excercises over Nurmsi Airfield in central Estonia, on Sept. 10, 2016. (Xinhua/Sergei Stepanov)
U.S. paratroopers take part in sky jump "Bayonet Strike" excercises over Nurmsi Airfield in central Estonia, on Sept. 10, 2016. (Xinhua/Sergei Stepanov)