As Afghanistan enters a perilous and uncertain future, the United Nations has promised to "stay and deliver." The country's humanitarian emergency is getting more acute by the day, taxing UN agencies like the World Food Program. Meanwhile, the Security Council's role in managing the political transition in Afghanistan is unclear, and many of the Taliban's senior leadership are still under UN sanction

On the line with me to discuss the UN's role in the new Afghanistan is Mark Malloch Brown. He is the President of the Open Society Foundations and had long career at the United Nations, including as administrator of the UN Development Program and as the Deputy UN Secretary General.