A NATO E-3 Sentry airborne warning and control system, or AWACS, taxis to the ramp during the 17th Baltic Region Training Event at iauliai Air Base, Lithuania, April 1, 2014. The event took place in the skies over the Baltic region to sharpen skills of aircrews and air controllers from the U.S., Lithuanian and Swedish air forces. The event is designed to enhance the interoperability between allied partners in NATO and its Partnership for Peace program. (U.S. Air Force photo by Airman 1st Class Dana J. Butler/Released)