Lt. Gen. Christopher F. Burne, The Judge Advocate General, Headquarters U.S. Air Force, presents a U.S. flag to Col. Lindsey Graham upon his retirement at the National Guard Memorial Museum. Senator Graham is retiring after three decades of service with the United States Air Force Reserve. Col. Graham is also the incumbent U.S. Senator of South Carolina. (U.S. Air National Guard photo by Airman 1st Class Anthony Small)