WINNEFELD ADDRESS Navy Adm. James A. Winnefeld Jr., vice chairman of the Joint Chiefs of Staff, delivers the commencement address at the National Defense University on Fort McNair in Washington, D.C., June 12, 2014. The university is a national security institution focused on advanced joint education, leader development and scholarship. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 331487-Y-UUX77-664.jpg Photo Gallery