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President of the Deutsche Bundesbank (German Central Bank) Jens Weidmann poses for a photo with a bar of ice-cream reading "From our deep freeze safe" during an open day event "Einblick in die Bundesbank" (Insight into Germany's Central Bank) for the press at the bank's headquarters in Frankfurt am Main, Germany, on July 11, 2014. Germany's Central Bank is open to the public from July 12 to 13, 2014. AFP PHOTO / DANIEL ROLAND (Photo credit should read DANIEL ROLAND/AFP/Getty Images)

President of the Deutsche Bundesbank (German Central Bank) Jens Weidmann poses for a photo with a bar of ice-cream reading "From our deep freeze safe" during an open day event "Einblick in die Bundesbank" (Insight into Germany's Central Bank) for the press at the bank's headquarters in Frankfurt am Main, Germany, on July 11, 2014. Germany's Central Bank is open to the public from July 12 to 13, 2014. AFP PHOTO / DANIEL ROLAND        (Photo credit should read DANIEL ROLAND/AFP/Getty Images)