Greece's PM Tsipras arrives at a euro zone leaders summit in Brussels
Greece's Prime Minister Alexis Tsipras arrives at a euro zone leaders summit in Brussels, Belgium, July 12, 2015. Euro zone leaders will fight to the finish to keep near-bankrupt Greece in the single currency on Sunday after the European Union's chairman canceled a planned summit of all 28 EU leaders that would have been needed in case of a "Grexit". REUTERS/Francois Lenoir