Missed the second half of the show? The latest on Iran - U.S. tensions and climate change....

Former Secretary of State John Kerry talks to Margaret Brennan about the recent attack on a Saudi oil plant and his efforts to address climate change....

David Sanger, Lanhee Chen, Ben Domenech and Radhika Jones join us to discuss tensions with Iran, the new upcoming U.N. General Assembly and President Trump's call to the Ukrainian president....