MULLAGHMORE, IRELAND - MAY 20:  Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit the village of Mullaghmore, where his great uncle Lord Mountbatten was killed in an IRA bomb attack in 1979, on May 20, 2015 in Mullaghmore, Ireland.  The Prince of Wales and Duchess of Cornwall arrived in Ireland yesterday for their four day visit to the Republic and Northern Ireland, the visit has been described by the British Embassy as another important step in promoting peace and reconciliation.  (Photo by Arthur Edwards -Pool /Getty Images)