Britain's Prince Philip

Britain's Prince Philip is pictured Windsor, England April 30, 2013.

Britain's Queen Elizabeth sits with Prince Philip as she delivers her speech in the House of Lords, during the State Opening of Parliament, London, May 8, 2013.

Britain's Prince Philip leaves after the Commonwealth Day Observance at Westminster Abbey, London, March 11, 2013.

Britain's Prince Philip walks past Czech army veterans who fought for Great Britain during Word War II after he laid a wreath at the Memorial of Czech pilots in Prague, March 29, 1996.

The Duke of Edinburgh Prince Phillip meets a Tuatara, a unique New Zealand reptile, face to face at a WWF meeting in Wellington, Jan. 3, 1995.