Associated Press
A Greek flag waves behind tourists at the ancient Acropolis hill, in Athens, on Tuesday, July 7, 2015. Greek Prime Minister Alexis Tsipras was heading Tuesday to Brussels for an emergency meeting of eurozone leaders, where he will try to use a resounding referendum victory to eke out concessions from European creditors over a bailout for the crisis-ridden country. (AP Photo/Petros Giannakouris)

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