U.S. Air Force 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 Dr. Paul N. Stockton upon his arrival at Tyndall Air Force Base, Fla., Feb. 10. Stockton came to Tyndall Air Force Base, Fla., for a familiarization tour of CONR-1st AF (AFNORTH). (U.S. Air Force photo by Angela Pope/Released)