Elizabeth Ii

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This photo made available on Tuesday Sept. 8, 2015, shows Britain's Queen Elizabeth II in a photo taken July 2015 and released by Buckingham Palace to mark the Queen becoming the longest-reigning British monarch. (Mary McCartney/Queen Elizabeth II via AP)

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German President Joachim Gauck, right , talks to Britain's Queen Elizabeth II after a military welcoming ceremony at the Bellevue Palace in Germany's capital Berlin, Wednesday June 24, 2015. Queen Elizabeth II and her husband Prince Philip are on an official visit to Germany until Friday, June 26. (AP Photo/Gero Breloer)

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Seated near the Magna Carta memorial at Runnymede, England, are from left, The Archbishop of Canterbury Justin Welby, Prime Minister David Cameron, and Queen Elizabeth II, ahead of a commemoration ceremony Monday June 15, 2015, to celebrate the 800th anniversary of the groundbreaking accord called Magna Carta. (Associated Press) ** FILE **

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Indianapolis Colts quarterback Peyton Manning, right, and his wife Ashley walk through the Booksellers Area as they arrive for the State Dinner in honor of Queen Elizabeth II and her husband Prince Philip, Monday, May 7, 2007, at the White House in Washington. (AP Photo/Haraz N. Ghanbari)

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Michelle Obama, wife of U.S. President Barack Obama, left, walks with Britain's Queen Elizabeth II at the reception at Buckingham Palace in London Wednesday, April 1, 2009. (AP Photo/Daniel Hambury, pool)

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FILE - In this Monday, June 6, 1994 file photo, Queen Elizabeth II is seen walking through the British Military Cemetery in Bayeux, France, during ceremonies honoring veterans and war dead on the 50th anniversary of D-Day. Queen Elizabeth II and her husband Prince Philip have for the most part stopped traveling overseas _ a reluctant concession to their advancing years _ but they are scrapping this policy next week for the 70th commemoration of the momentous D-Day invasion on June 6, 2014. The perils of World War II directly shaped the lives of Elizabeth, 88, and Philip, 92. The anniversary is so heartfelt that the royal couple is preparing to cross the English Channel once more, this time on a Eurostar train through the Channel Tunnel Elizabeth helped 20 years ago. (AP Photo/Laurent Rebours, File)