Prince Charles Attends Memorial Ceremony at September 11 Memorial Garden in Grovesnor Square

LONDLONDON, ENGLAND - SEPTEMBER 11: The U.S. Ambassador Louis Susman, Prime Minister David Cameron and Prince Charles, Prince of Wales lay wreaths at a memorial ceremony at the September 11 memorial garden in Grovesnor Square on September 11, 2011 in London, England. Ceremonies held around the world have joined Washington and New York as they commemorate the tenth anniversary of the 9/11 terrorist attacks where nearly 3000 people died when four hijacked airliners were used in coordinated attacks against the United States. Getty Images