World Update: Daily Commute

How will Brexit affect the long-standing and often complex relationship between the United Kingdom and the Republic of Ireland? Very significantly, says Diarmaid Ferriter, who is a professor of modern Irish history at University College Dublin. He spoke to Dan Damon about trade, travel and peace.(Photo: British Prime Minister Theresa May meets Irish Prime Minister Enda Kenny in London. Credit: Stefan Rousseau/Getty Images)