From the very start of his war with Iran, Donald Trump never laid out a coherent exit strategy. The regional implications have been massive: a complete upheaval all over the Middle East with Gulf allies of the US dragged into a war they wanted no part in. Retired four-star General Stanley McChrystal led US and NATO forces in Afghanistan, and before that, as Special Forces Commander in Iraq he led the mission to kill Al-Qaeda leader Abu Musab Al-Zaraqawi. McChrystal joins Christiane from Washington. 

Also on today's show: Palestinian Aziz Abu Sarah & Israeli Maoz Inon on their new book, "The Future is Peace"; author Michael Pollan on his new book, "A World Appears: A Journey into Consciousness"