SLIGO, IRELAND - MAY 20:  Prince Charles, Prince of Wales reads a letter from Lord Mountbatten shown to him by Daithi O'Dowd as he meets members of the local community in the peace garden on May 20, 2015 in Sligo, Ireland. The Prince of Wales was visiting the village in County Sligo where his great uncle Lord Mountbatten was killed by the IRA when a bomb exploded on his fishing boat on August 27, 1979, three other people were also killed in the attack.  (Photo by Arthur Edwards- WPA Pool/Getty Images)