Ukrainian Prime Minister Arseniy Yatsenyuk (2-R) and EU Council President Herman Van Rompuy (R) exchange documents during the signing ceremony of political provisions of the Association Agreement with Ukraine at EU council headquaters in Brussels, Belgium, on March 21, 2014. Applauding are British Prime Minister David Cameron (3-L), Swedish Prime Minister Frederik Reinfeldt (2-L) and Finnish Prime Minister Jyrki Katainen (L). (EPA/OLIVIER HOSLET)