epa04713477 Ukrainian National Guard and US soldiers attend 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 US Army will train Ukrainian National Guard soldiers. The training program is part of a long-term strategy to improving Ukrainian defence potential and increasing of the professionalism of the Ukrainian Armed Forces. EPA/SERGEY DOLZHEKO