NDU Graduation Air Force Gen. Paul J. Selva, vice chairman of the Joint Chiefs of Staff, speaks at the National Defense University Graduation at Fort Lesley J. McNair in Washington D.C., June 7, 2018. The NDU Class of 2018 consists of leaders from the U.S. military services, the Defense Department, other federal government agencies, as well as from the foreign militaries of 66 allied and partner nations. DoD Photo by Army Sgt. James K. McCann SHARE IMAGE: Download Image: Full Size (1.06 MB) Tags: Paul J. Selva, Vice Chairman, Airmen, Air Force, Joint Chiefs Photo By: Sgt. James K. McCann VIRIN: 180607-D-SW162-1151C.JPG Photo Gallery