The Duke Of Edinburgh Attends The Opening Of The First World War In The Air Exhibition [Getty Images]

LONDON, UNITED KINGDOM - DECEMBER 02: The Duke Of Edinburgh attends the opening of the 'First World War In The Air' exhibition at the RAF museum in Hendon where The Duke was shown around the gallery by Chairman of the Trustees Air Chief Marshal Sir Glen Tory, Ms Karen Whitting Director of Public Programmes and Angela Vinci Project Manager on December 02, 2014 in London, England. (Photo by Eddie Mulholland - WPA Pool /Getty Images)

Getty Images Entertainment WPA Pool