Securing the Baltic Region

Fighters from Lithuania's army rapid reaction unit attend the Zaibo Kirtis (Lightning Strike) joint anti-riot drill in Svencioneliai, Lithuania, May 10, 2015. (Photo by Ints Kalnins/Reuters)

Paratroopers of the 173rd Airborne Brigade of the U.S. Army in Europe take part in military exercise “Black Arrow” in Rukla May 14, 2014. (Photo by Ints Kalnins/Reuters)

U.S. troops cross the Lithuanian-Latvian border during tactical road march Dragoon Ride II in Subate, Latvia, June 6, 2016. (Photo by Ints Kalnins/Reuters)

Lithuanian army soldiers attend the Spring Storm military exercise near the Estonia's eastern border in Rapina, Estonia, May 13, 2016. (Photo by Ints Kalnins/Reuters)

NATO and U.S. flags flutter as U.S. Air Force F-22 Raptor fighter flies over the military air base in Siauliai, Lithuania, April 27, 2016. (Photo by Ints Kalnins/Reuters)

Norwegian Air Force's F-16 fighters (R) and Italian Air Force's Eurofighter Typhoon fighters patrol over the Baltics during a NATO air policing mission from Zokniai air base near Siauliai, Lithuania, May 20, 2015. (Photo by Ints Kalnins/Reuters)

A U.S. A - 10 plane fires as it takes part in the “Saber Strike” NATO military exercise in Adazi, Latvia, June 13, 2016. (Photo by Ints Kalnins/Reuters)

A U.S. Apache helicopter fires as it takes part in the “Saber Strike” NATO military exercise in Adazi, Latvia, June 13, 2016. (Photo by Ints Kalnins/Reuters)

A U.S. B-52 bomber takes part in the “Saber Strike” NATO military exercise in Adazi, Latvia, June 13, 2016. (Photo by Ints Kalnins/Reuters)

U.S. army personal take part in the “Saber Strike” NATO military exercise in Adazi, Latvia, June 13, 2016. (Photo by Ints Kalnins/Reuters)

Norwegian army soldiers take part in the “Saber Strike” NATO military exercise in Adazi, Latvia, June 13, 2016. (Photo by Ints Kalnins/Reuters)

A U.S. Apache helicopter fires as it takes part in the “Saber Strike” NATO military exercise in Adazi, Latvia, June 13, 2016. (Photo by Ints Kalnins/Reuters)