Biden has stronger views on Brexit than Donald Trump.
EPA/Jim Lo Scalzo
The question of the Irish border after Brexit is a more pressing matter for the next president than it has been for his predecessor.
EPA/Shawn Thew
The US is a key player in the Good Friday Agreement – but there's an election to think about too.
EPA/UK Parliament
Whether it's bluster or not, a dangerous message has been sent to the rest of the world that the UK may be willing to backtrack on important promises.
PA.
A crisis can create divisions but it can also help heal them.
Stormont has been closed for several years, with Northern Ireland’s governing parties unable to agree a way forward.
PA
Some of Northern Ireland's biggest problems have nothing to do with leaving the EU, but all anyone talks about now is the backstop.
Grafitti in Creggan, near where Lyra McKee was shot.
Brian Lawless/PA Wire
Some of those who've grown up after the 1998 Good Friday Agreement are drawn into paramilitary groups due to a lack of power, protection and belonging.
Signs of protest along the Irish border.
AP Photo/Peter Morrison
Two scholars examine days of parliamentary debate to learn how British MPs talk about the 'Irish backstop' and maintaining peace in Northern Ireland.
A mural in Bogside in Derry/Londonderry near the site of the events of Bloody Sunday.
murielle29/flickr
Why a broad amnesty for Northern Ireland's Troubles remains unlikely.
Brian Lawless/PA Wire
What do Theresa May's last minute Brexit guarantees mean for the Irish border?
Trimble: challenging the backstop.
Brian Lawless/PA Archive
One of the architects of the Good Friday Agreement, David Trimble, is threatening legal action against a controversial part of the Brexit withdrawal agreement.
Protesters set up a mock checkpoint at the Irish border in January.
Brian Lawless/PA Wire
Why much of the fate of the Irish border lies in the future of the UK's customs arrangements with the EU.
Christian Bruna/EPA
The question of the Irish border remains at the centre of Brexit negotiations after an informal summit of EU leaders in Salzburg.
EPA
The only way forward is a more inclusive unionism that reflects the diverse and multicultural nature of the UK.
The Irish border: invisible for now.
Paul McErlane/EPA
Is the UK's Brexit plan enough to avoid a hard Irish border?
Shutterstock
Recent political events have raised the subject of Irish unity once again. But several issues need to be addressed first.
The old border was a source of anger, resentment and violence.
henrikjohn/flickr
After Brexit, politicians hope that technology can help us avoid a hard border in Ireland.
A loyalist mural in Belfast.
Punchyy/flickr.com
Twenty years since the Good Friday Agreement, it remains easier to rely on old animosities than lead people towards peace.
After signing the Good Friday Agreement, Irish Prime Minister Bertie Ahern, U.S. Sen. George Mitchell and British Prime Minister Tony Blair.
AP Photo
The agreement created peace between Irish nationalists and those who support being part of the United Kingdom. With Brexit looming, tensions are once again rising.
David Trimble, Tony Blair and John Hume: campaigning for a yes vote on the Good Friday Agreement in May 1998.
Chris Bacon/PA Archive
The Good Friday Agreement was choreographed 20 years ago to maximise support for the deal.
Mo Mowlam, secretary of state for Northern Ireland at the time of the Good Friday Agreement.
PA Archive
In a series of short audio clips, four academics talk about the key figures involved in making the Good Friday Agreement of April 1998 possible.