In pictures: The royal couple visit the National September 11 Memorial Museum in New York City
Britain's Prince William and his wife, Kate, paid a solemn visit on Tuesday to the National September 11 Memorial and Museum, greeted by a small but resolute crowd of admirers who withstood driving rain and wind for a glimpse of the royal pair
Prince William, Duke of Cambridge and his wife Catherine, Duchess of Cambridge, during a visit to the National September 11 Memorial Museum on December 9, 2014 in New York City.Carl Court/Getty Images
Prince William, Duke of Cambridge and his wife Catherine, Duchess of Cambridge, during a visit to the National September 11 Memorial Museum on December 9, 2014 in New York City.Carl Court/Getty Images
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge do a virtual signing of the South Tower Column during a visit the National September 11 Memorial & Museum on December 09, 2014 in New York City.Pool/Getty Images
Prince William, Duke of Cambridge (3R) and Catherine, Duchess of Cambridge (R) look on during a tour to the National September 11 Memorial & Museum on December 09, 2014 in New York City.Pool/Getty Images
Kate, Duchess of Cambridge, and Britain's Prince William are escorted by Joe Daniels, president & CEO of the National September 11 Memorial & Museum in the Hall of Faces, during their visit to the National September 11 Museum, Tuesday, Dec. 9, 2014.Richard Drew/The Associated Press
Prince William, Duke of Cambridge and his wife Catherine, Duchess of Cambridge, lay flowers at the Memorial Reflection Pool during their during a visit to the National September 11 Memorial Museum on December 9, 2014 in New York City.Carl Court/Getty Images