Afghan President Ghani: Partnership with U.S. ‘revitalized’

President Obama announced that the U.S. would scale back the pace of its promised troop pullout from Afghanistan, retaining current forces this year. Gwen Ifill interviews President Ashraf Ghani about thawing relations with the U.S., potential changes in how Pakistan differentiates between terror groups and whether the threat of the Islamic State might drive the Taliban to the negotiating table.