VALLETTA, MALTA - NOVEMBER 27:  (L-R) Malta Prime Minister Joseph Muscat, Queen Elizabeth II and Commonwealth Secretary General Kamalesh Sharma for the family photo of the Commonwealth Heads of State at the CHOGM opening ceremony at the Mediterranean Conference Centre on November 27, 2015 near Valletta, Malta. Queen Elizabeth II, The Duke of Edinburgh, Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall arrived today to attend the Commonwealth Heads of State Summit.  (Photo by Matt Cardy-Pool/Getty Images)