March 30: Russia-Ukraine peace talks in Turkey. FDA approves second booster shot. Latest fallout from Will Smith’s Oscar slap.

<p>Richard Engel has the latest on the Ukraine-Russia war – this, as day two of face-to-face talks in Istanbul stir optimism. Plus, Savannah Guthrie and Hoda Kotb speak with Dr. Richard Besser after the FDA gives a greenlight to a second booster of the Pfizer and Moderna vaccines for anyone over 50 and the immunocompromised. And, could Will Smith lose his Oscar after that onstage slap? We have the latest on the fallout as Chris Rock prepares for his first comedy show since the incident. </p>