UN food aid chief: Yemen war must end to address starvation

In Yemen, 10,000 are estimated to have been killed in the war that's been raging for three and a half years. But millions are suffering from an acute hunger crisis and the United Nations warns that Yemen is on the brink of famine. David Beasley of the World Food Programme joins Nick Schifrin to describe the catastrophe and his appeals for a cease-fire.