A man walks his dog at an Athens street
EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A man walks his dog on an alley covered by graffiti in Athens June 17, 2015. Greek Prime Minister Alexis Tsipras accused the Greece's creditors on Tuesday of trying to "humiliate" the country with more cuts, amid warnings that Europe was preparing for his country to leave the euro. REUTERS/Yannis Behrakis