Ukrainian Prime Minister Arseniy Yatsenyuk, center, shake hands with a Ukrainian soldier at a block post on the road at Slovyansk, Ukraine, Wednesday, May 7, 2014. Ukrainian military operations that began Monday to expunge pro-Russia forces from the city of Slovyansk were the interim government's most ambitious effort so far to quell weeks of unrest in Ukraine's mainly Russian-speaking east. (Photo by Andrew Kravchenko/AP Photo)
