inn Fin's Martin McGuinness, Northern Ireland's former deputy first minister, has died aged 66.It is understood he had been suffering froma rare heart condition.The former IRA leader turned peacemakerworked at the heart of the power-sharing government following the 1998 Good Friday Agreement.He became deputy first minister in 2007, standing alongside Democratic Unionist Party leaders Ian Paisley, Peter Robinson and Arlene Foster.Live reaction to death of Martin McGuinnessObituary: Martin McGuinness...