Professor Richard Shultz, professor of international politics, poses a question to Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, during a discussion at the Tufts University Fletcher School of Law & Diplomacy, Medford, Mass., Nov. 14, 2017. The chairman spoke about challenges facing the Defense Department and answered questions from students, faculty and alumni. DoD photo by Army Sgt. James K. McCann