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A man walks past graffiti painted on a closed shop at Monastiraki area in central Athens...A man walks past graffiti painted on a closed shop at Monastiraki area in central Athens, Greece, July 7, 2015. Greece faces a last chance to stay in the euro zone on Tuesday when Prime Minister Alexis Tsipras puts proposals to an emergency euro zone summit after Greek voters resoundingly rejected the austerity terms of a defunct bailout.

Christian Hartmann/Reuters

A man walks past graffiti painted on a closed shop in the Monastiraki area in central Athens, Greece. Greece faces a last chance to stay in the eurozone on Tuesday when Prime Minister Alexis Tsipras puts proposals to an emergency eurozone summit

Treasury Secretary Jack Lew testifies during a Senate Finance Committee hearing on Capitol Hill, October 10, 2013 in Washington, DC. The committee is hearing testimony from Secretary Lew on the nations debt limit.

Mark Wilson/Getty Images

Treasury secretary Jack Lew testifies at the Senate finance committee hearing on Capitol Hill, Washington, on Thursday. The committee is hearing testimony on the nation’s debt limit.