By David Martosko In Washington PUBLISHED: 15:54 EST, 26 July 2013 | UPDATED: 16:26 EST, 26 July 2013 David Ubben, a State Department diplomatic security agent who was gravely injured in the terror attack on the U.S. Consulate in Benghazi, Libya, is in the Walter Reed medical center near Washington, D.C., recuperating from injuries…