The fistbump seen ‘round the world: Tom Collina discusses Biden’s recent trip to the Middle East with Trita Parsi, executive vice president at the Quincy Institute for Responsible Statecraft. Parsi covers the purpose of Biden’s trip and what it means for US diplomacy efforts. On Early Warning, Angela Kellett sits down with Dr. Cheryl Harrison, assistant professor in the Department of Oceanography and Coastal Sciences at Lousiana State University and lead researcher of a new paper that investigates the impact of nuclear weapons on the climate.