FILE - In this Nov. 21, 1956 file photo, Britain's Prince Philip, right, is welcomed to Olympic Stadium in Melbourne, Australia by Australian Prime Minister Robert Menzies as the Duke of Edinburgh officially opens the Olympic games. Australia's prime minister on Monday, Jan. 26, 2015 dismissed criticism of his decision to make the husband of Queen Elizabeth II an Australian knight, saying Philip has a long history of service Down Under. Prime Minister Tony Abbott's announcement that the duke would be awarded Australia's highest honor came on Australia's national holiday, prompting some to question the wisdom of knighting a British royal on a day meant to commemorate Australians. (AP Photo/File)