Cars cross the fluid border between Ireland and Northern Ireland in Donegal, Ireland, on June 25, 2016. The result of Britain's referendum vote to leave the European Union has sparked a debate over whether the border will need to establish customs checks
Cars cross the fluid border between Ireland and Northern Ireland in Donegal, Ireland, on June 25, 2016. The result of Britain's referendum vote to leave the European Union has ignited a debate over whether the border will need to establish customs checks 