Carmelite nuns prepare to cast their vote at a polling station in North Dublin, Ireland, Thursday, May 31, 2012, as Irish voters went to the polls Thursday to vote in the European Fiscal Treaty Referendum. Irish voters are deciding Thursday whether their government can ratify the European Union's Fiscal Treaty, a deficit-fighting pact designed to bind Ireland and other debt-hit eurozone members to much tighter spending limits. (AP Photo/Peter Morrison)

Photos of the day. May 31, 2012