Northern Ireland border comes back as a stumbling block for British-EU relations.
European Commission President Jean-Claude Juncker tweeted: "We have one! It’s a fair and balanced agreement for the EU and the UK and it is testament to our commitment to find solutions."
Could technology help prevent bottlenecks on the EU-U.K. border?
The border between the Republic of Ireland and the U.K. province of Northern Ireland is a big Brexit sticking point.
The Irish Republic wants a guarantee that the border will remain open after Britain leaves the European Union. ...will stay as open as it is today.
U.K. citizens are digging out old documents that show Irish lineage.