Lord John Alderdice, Lord David Trimble, Sir Reg Empey, (back row left to right) & Monica McWilliams, Seamus Mallon, former Taoiseach Mr Bertie Ahern, Senator George J. Mitchell, Gerry Adams pose for a photo outside at Queen's University Belfast, Tuesday, April 10th, 2018. Tuesday marks 20 years since politicians from Northern Ireland and the British and Irish governments agreed what became known as the Good Friday Agreement. It was the culmination of a peace process which sought to end 30 years of the Troubles. Two decades on, the Northern Ireland Assembly is suspended in a bitter atmosphere between the two main parties.