It's been two years since the worst American humiliation since the fall of Saigon: The sudden and total collapse of the America government in Afghanistan, the triumph of the Taliban after 20 years in war, and the desperate evacuation of the last U.S. personnel from the Kabul airport. Now, Jerry Dunleavy and James Hasson have a new book, "Kabul," giving the untold story of that disaster, and how the blame for that disaster rest squarely on the shoulders of President Joseph R. Biden.