BERLIN, GERMANY - JUNE 19: U.S. President Barack Obama smiles as he signs the official guest book at Bellevue Palace on June 19, 2013 in Berlin, Germany. U.S. President Barack Obama is visiting Berlin for the first time during his presidency and his speech at the Brandenburg Gate is to be the highlight. Obama will be speaking close to the 50th anniversary of the historic speech by then U.S. President John F. Kennedy in Berlin in 1963. (Photo by Thomas Imo/Photothek via Getty Images)
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Photothek Thomas Imo