Pro-Russian gunmen guard a checkpoint outside Slovyansk, eastern Ukraine, Thursday, May 15, 2014. On Thursday, Ukraine's acting president, Oleksandr Turchynov, claimed the Ukrainian army destroyed an insurgent base in the city of Slovyansk and another one in nearby Kramatorsk, about 150 kilometers (95 miles) west of the Russian border. (Photo by Alexander Zemlianichenko/AP Photo)
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