A couple makes a transaction at an ATM outside an Attica bank branch in Athens June 29, 2015 644 × 408 Greece Closes Banks 'til Referendum as ECB Flip-flops on ELA A couple makes a transaction at an automated teller machine (ATM) outside an Attica bank branch with a graffiti on it in central Athens, August 28, 2012. REUTERS/John Kolesidis