Sinn Fein's Michelle O'Neill says Brexit is a gamechanger, but the DUP's Arlene Foster doesn't consider Irish unity inevitable.

What should we call a project that poleaxes the economy, destroys our global reputation and threatens political stability in Northern Ireland? If we had known what would come to pass, how would we have voted on it six years ago?

The new first minister represents a party that does not acknowledge Northern Ireland's six counties as separate from the 26 counties in the Republic of Ireland. The historic moment has huge implications, David Blevins writes.