Reviewing history in the military, the Air Force and triumphs and misadventures in airpower. On Nov. 21, 1963, President John F. Kennedy dedicated six new buildings as part of the Aerospace Medical Division at Brooks Air Force Base, San Antonio, Texas. His dedication at Brooks AFB — which closed in 2011 — was in line with his Texas tour, with stops planned for San Antonio, Houston, Fort Worth, Dallas and Austin. In National Geographic’s “JFK: The Final Hours,” the documentary sheds light on the unexpected moments of the president’s trip before tragedy struck in Dallas. Even though Kennedy was on…