LONDON, ENGLAND - MARCH 03: Queen Elizabeth II greets Home Secretary Theresa May (4th R) as they await the arrival of the President of Mexico, Enrique Pena Nieto and his wife Angelica Rivera during a Ceremonial Welcome at Horse Guards Parade on March 3, 2015 in London, England. The President of Mexico, accompanied by Senora Angelica Rivera de Pena, are on a State Visit to the United Kingdom as the guests of Her Majesty The Queen from Tuesday 3rd March to Thursday 5th March. (Photo by Leon Neal - WPA Pool /Getty Images)
