Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, teaches a class on ethics to midshipmen during his visits the U.S. Naval Academy in Annapolis, Md., March 26, 2014. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, teaches a class on ethics to midshipmen during his visits the U.S. Naval Academy in Annapolis, Md., March 26, 2014. SHARE: Download: Full Size (2.54 MB) Tags: Photo Essays Credit: VIRIN: 755034-E-TYF06-032.jpg Photo Gallery