Day 205: FDA approves third vaccine dose for immunocompromised

<p>As the FDA approves a third vaccine dose for some, a stark new warning from the CDC details  how pervasive the Delta variant is across the nation. Plus, we discuss the unfolding situation in Afghanistan where thousands of U.S. troops are returning for a partial evacuation of the U.S. Embassy in Kabul. Joining the show are Yamiche Alcindor, Gen. Barry McCaffrey, Dr. Peter Hotez, David Plouffe, Mark McKinnon, and Dr. Murtaza Ahkter.</p>