A E.U. flag and a Greek flag flutter in front of the monument of Parthenon on Acropolis hill in Athen

A European Union (E.U.) flag (front) and a Greek flag flutter in front of the monument of Parthenon on Acropolis hill in Athens June 17, 2012. Greeks voted on Sunday in an election that could decide whether their heavily indebted country stays in the euro zone or heads for the exit, potentially unleashing shocks that could break up the single currency. REUTERS/John Kolesidis (GREECE – Tags: POLITICS BUSINESS ELECTIONS)