Queen Elizabeth and Prince Philip are presented with a gift by the then-Sultan of Oman, Sultan Qaboos bin Said al Said, before a state banquet in Muscat, Oman, in 2010. Getty Images
Queen Elizabeth II and Prince Philip greet UAE President Sheikh Khalifa, at Windsor Castle in 2013. Getty Images
Sheikh Zayed, Queen Elizabeth and Prince Philip seated before lunch at the Hilton Hotel in Abu Dhabi, in 1979. Getty Images
UAE President Sheikh Khalifa speaks to Queen Elizabeth and Prince Philip during their visit to Abu Dhabi in 2010. Getty Images
Prince Philip attends a military air display in Abu Dhabi in 2010. Getty Images
Queen Elizabeth and Prince Philip together during a visit to Abu Dhabi in 1979, which was part of their tour of the Gulf. Getty Images
Sheikh Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, speaks to Queen Elizabeth and Prince Philip during a visit to the Sheikh Zayed Grand Mosque in 2010. Getty Images
Prince Philip visits a souq in Muscat during a state visit to Oman in 1979. Getty Images
Prince Philip looks at a hawk during a visit to Manama, Bahrain, in 1979. Getty Images
Queen Elizabeth and Prince Philip disembark the Royal Yacht Britannia in Kuwait, in 1979. Getty Images
Queen Elizabeth and Prince Philip are presented with a gift by the then-Sultan of Oman, Sultan Qaboos bin Said al Said, before a state banquet in Muscat, Oman, in 2010. Getty Images
Queen Elizabeth II and Prince Philip greet UAE President Sheikh Khalifa, at Windsor Castle in 2013. Getty Images
Sheikh Zayed, Queen Elizabeth and Prince Philip seated before lunch at the Hilton Hotel in Abu Dhabi, in 1979. Getty Images
UAE President Sheikh Khalifa speaks to Queen Elizabeth and Prince Philip during their visit to Abu Dhabi in 2010. Getty Images
Prince Philip attends a military air display in Abu Dhabi in 2010. Getty Images
Queen Elizabeth and Prince Philip together during a visit to Abu Dhabi in 1979, which was part of their tour of the Gulf. Getty Images
Sheikh Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, speaks to Queen Elizabeth and Prince Philip during a visit to the Sheikh Zayed Grand Mosque in 2010. Getty Images
Prince Philip visits a souq in Muscat during a state visit to Oman in 1979. Getty Images
Prince Philip looks at a hawk during a visit to Manama, Bahrain, in 1979. Getty Images
Queen Elizabeth and Prince Philip disembark the Royal Yacht Britannia in Kuwait, in 1979. Getty Images
Queen Elizabeth and Prince Philip are presented with a gift by the then-Sultan of Oman, Sultan Qaboos bin Said al Said, before a state banquet in Muscat, Oman, in 2010. Getty Images