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Mario Draghi, President of the European Central Bank, in the ECB headquaters on December 4, 2014 in Frankfurt am Main, Germany. (Thomas Lohnes/Getty Images)

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Bullets holes are seen through the glass door of a cafe near Casa Nostra after the terror attack on November 14, 2015 in Paris, France. (Christopher Furlong/Getty Images)

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US President Barack Obama holds a press conference following the G20 summit in Antalya, November 16, 2015. (SAUL LOEB/AFP/Getty Images)