epa04713444 US soldiers stand line during the opening ceremony of joint military exercises near the western Ukrainian city of Lviv, Ukraine, 20 April 2015. Fearless Guardian ? 2015 drill kicked off at the Yavoriv military base in western Ukraine, close to the border with Poland. Some 300 US soldiers from the 173th Airborne Brigade Combat Team of the U.S. Army will train Ukrainian National Guard soldiers. The training program is part of a long-term strategy improving of Ukrainian defense potential and increasing of the professionalism of the Ukrainian Armed Forces. EPA/SERGEY DOLZHEKO