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BERLIN, GERMANY - JUNE 24: Prince Philip, Duke of Edinburgh and Queen Elizabeth II during a wreath laying ceremony at the Neue Wache on the second day of a four day state visit to Germany, on June 24, 2015 in Berlin, Germany. The Queen and Prince Philip are scheduled to visit Berlin, Frankfurt and the concentration camp memorial at Bergen-Belsen during their trip, which is their first to Germany since 2004. (Photo by John Stillwell - Pool /Getty Images)

BERLIN, GERMANY - JUNE 24: Prince Philip, Duke of Edinburgh and Queen Elizabeth II during a wreath laying ceremony at the Neue Wache on the second day of a four day state visit to Germany, on June 24, 2015 in Berlin, Germany. The Queen and Prince Philip are scheduled to visit Berlin, Frankfurt and the concentration camp memorial at Bergen-Belsen during their trip, which is their first to Germany since 2004.  (Photo by John Stillwell - Pool /Getty Images)