U.S. Institute of Peace President Nancy Lindborg moderates a discussion between U.S. Agency for International Development Administrator Mark Green and Air Force Gen. Paul J. Selva, vice chairman of the Joint Chiefs of Staff, during the U.S. Global Leadership Coalition’s 2018 State Leaders Summit in Washington, June 18, 2018. They discussed the world’s ongoing humanitarian challenges and how America’s tools of diplomacy, defense, and development are working to prevent and solve global crises. DoD photo by Army Sgt. James K. McCann