Lt. Gen. Sid Clarke, Continental U.S. North American Aerospace Defense Command Region-1st Air Force (Air Forces Northern) commander, greets Assistant Secretary of Defense for Homeland Defense and Americas’ Security Affairs Paul N. Stockton upon his arrival at Tyndall Air Force Base, Fla., Feb. 10. Stockton came to Tyndall for a familiarization tour of CONR-1st AF (AFNORTH). (U.S. Air Force photo by Angela Pope)