A pro-Russian armed militant wearing a shirt bearing an emblem of a former Ukrainian special force's police unit "Berkut," which means golden eagle, is seen through a camouflage net as he guards a checkpoint blocking the major highway which links the Russian city of Rostov-on-Don, and Kharkiv, outside Slovyansk, Ukraine, Monday, May 26, 2014. On Monday, some pro-Russians blocked off the road to the airport in Donetsk, a major eastern city, apparently causing delays to many flights. (AP Photo/Alexander Zemlianichenko)