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Britain's Queen Elizabeth II greets Myanmar's de facto leader Aung San Suu Kyi (L) ahead of a private lunch at Buckingham Palace in London on May 5, 2017. / AFP PHOTO / POOL / John Stillwell (Photo credit should read JOHN STILLWELL/AFP/Getty Images)

Britain's Queen Elizabeth II greets Myanmar's de facto leader Aung San Suu Kyi (L) ahead of a private lunch at Buckingham Palace in London on May 5, 2017. / AFP PHOTO / POOL / John Stillwell        (Photo credit should read JOHN STILLWELL/AFP/Getty Images)

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Britain's Queen Elizabeth II greets Myanmar's de facto leader Aung San Suu Kyi (L) ahead of a private lunch at Buckingham Palace in London on May 5, 2017. / AFP PHOTO / POOL / John Stillwell (Photo credit should read JOHN STILLWELL/AFP/Getty Images)

Britain's Queen Elizabeth II greets Myanmar's de facto leader Aung San Suu Kyi (L) ahead of a private lunch at Buckingham Palace in London on May 5, 2017. / AFP PHOTO / POOL / John Stillwell        (Photo credit should read JOHN STILLWELL/AFP/Getty Images)

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Britain's Queen Elizabeth II greets Myanmar's de facto leader Aung San Suu Kyi (L) ahead of a private lunch at Buckingham Palace in London on May 5, 2017. / AFP PHOTO / POOL / John Stillwell (Photo credit should read JOHN STILLWELL/AFP/Getty Images)

Britain's Queen Elizabeth II greets Myanmar's de facto leader Aung San Suu Kyi (L) ahead of a private lunch at Buckingham Palace in London on May 5, 2017. / AFP PHOTO / POOL / John Stillwell        (Photo credit should read JOHN STILLWELL/AFP/Getty Images)