QI’s Adam Weinstein, Joe Cirincione on The Last Word with Lawrence O’Donnell

President Biden defends his decision to pull troops out of Afghanistan after at least 13 U.S. service members and dozens of Afghan civilians are killed outside Kabul’s airport. National security expert Joe Cirincione and Marine veterans Timothy Kudo and Adam Weinstein, both of whom served in Afghanistan, join Lawrence O’Donnell to discuss.