Politicians from both sides of the Irish border will be in Washington tomorrow to help President Obama celebrate a belated St Patrick's Day. A symbol of the progress since the signing of the Good Friday Agreement in 1998, but back home divisions still run deep. Few are willing to confess the role they might have played in past violence. But former Loyalist and Republican paramilitaries are looking for a way forward, a journey that's taken them to the townships of South Africa.
Fergal Keane, a reporter for our partner the BBC, reports on a unique experiment from South Africa.