NATO Holds "Spring Storm" Military Exercises

HELME, ESTONIA - MAY 19: An F-16 fighter plane of the Royal Danish Air Force simulates an attack during a demonstration while participating in the NATO "Spring Storm" military exercises on May 19, 2014 near Helme, Estonia. The annual exercises, in which Estonian, Latvian, Lithuainian, U.S., British, Polish, Belgian and Danish troops are participating, are underway as sporadic fighting between Ukrainian and pro-Russian separatists continues in eastern Ukraine. (Photo by Sean Gallup/Getty Images)