Pentagon Remarks Deputy Defense Secretary Patrick M. Shanahan speaks to Keystone class 18-1 at the Pentagon, March 13, 2018. Keystone educates command senior enlisted leaders serving in, or slated to serve in, general or flag officer level joint or service headquarters. DoD photo by Army Sgt. James K. McCann SHARE: Download: Full Size (1.56 MB) Credit: Sgt. James K. McCann VIRIN: 180313-D-SW162-1025.JPG Photo Gallery