Arseniy Yatsenyuk

Ukrainian opposition leader Arseniy Yatsenyuk , center, waits for the start of a Civil Society Forum prior to an Eastern Partnership Summit in Vilnius on Thursday, Nov. 28, 2013. European Union leaders meet Thursday and Friday for a summit that is set to be overshadowed by a power struggle with Russia for influence in post-Soviet states. (AP Photo/Mindaugas Kulbis)