Good Friday Agreement: Denis Murray speaks to Lord Trimble and Seamus Mallon
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.
Former BBC Ireland correspondent Denis Murray has spoken to two of the key architects of the agreement, Lord Trimble and Seamus Mallon.
You can see the full report on the BBC 10 o'clock news.