Ian Paisley, then-leader of the Democratic Unionist Party, talks to supporters at the Northern Ireland Assembly Election count in Balleymoney, Northern Ireland, in 2003. The DUP announced Friday that Paisley had died after a protracted illness. He was 88. Peter MacDiarmid/Reuters/Landov hide caption

itoggle caption Peter MacDiarmid/Reuters/Landov

Sinn Fein's Gerry Kelly speaks to the media outside Antrim's police station in Antrim, Northern Ireland, Sunday. Police released Sinn Fein leader Gerry Adams after five days of questioning him about the 1972 murder of Jean McConville. Peter Morrison/AP hide caption

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Sinn Fein President Gerry Adams was arrested Wednesday as part of an investigation into one of Northern Ireland's most controversial killings. Neil Hall/Reuters /Landov hide caption

itoggle caption Neil Hall/Reuters /Landov

Queen Elizabeth II shook hands with Deputy First Minister of Northern Ireland Martin McGuinness today in Belfast. McGuinness is a former senior member of the IRA. Paul Faith/WPA Pool/Getty Images hide caption

itoggle caption Paul Faith/WPA Pool/Getty Images