Britain's Catherine, Duchess of Cambridge (2nd R) and her husband Prince William (2nd L) pose for an official photograph as they attend a St. Patrick's Day Parade at Mons Barracks in Aldershot, southern England March 17, 2013. Prince William attended the Parade as Colonel of the Regiment, and the Duchess presented the traditional sprigs of shamrocks to the Officers and Guardsmen of the Regiment.[Photo/Agencies]