Defense University Multiple individuals, including now-retired Army Gen. Martin E. Dempsey, walk through the colonnade at the entrance to the National Defense University at Fort Lesley J. McNair in Washington, D.C., June 24, 2013. SHARE: Download: Full Size (2.36 MB) Credit: Navy Petty Officer 1st Class Daniel Hinton VIRIN: 130624-D-KC128-010M.JPG Photo Gallery