Britain's Prime Minister David Cameron speaks during a National Service of Thanksgiving to mark the 90th birthday of Britain's Queen Elizabeth II at St Paul's Cathedral in London, Friday, June 10, 2016. Queen Elizabeth II is celebrating her official 90th birthday with a three-day series of festivities starting Friday, on what is also her husband Prince Philip's 95th birthday. The queen's real birthday is in April. (Ben Stansall/Pool Photo via AP)