NEW YORK, NY - DECEMBER 09: The flowers left by Prince William, Duke of Cambridge and his wife Catherine, Duchess of Cambridge, are pictured at the Memorial Reflection Pool after their visit to the National September 11 Memorial Museum on December 9, 2014 in New York City. The couple, who are traveling without their son Prince George, are on a three-day US east coast visit. This is the Duke and Duchess' first official visit to New York City. (Photo by Carl Court - WPA Pool/Getty Images)
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