KENTUCKY AIR NATIONAL GUARD BASE, LOUISVILLE, Ky. -- Members of the Kentucky Air National Guard greet Vice President Joe Biden as he descends the stairs of Air Force Two at the Kentucky Air Guard Base in Louisville, Ky., on Feb 11, 2011. Pictured from left to right are Brig. Gen. Mark Kraus, Kentucky's assistant adjutant general for Air; Col. Greg Nelson, commander of the 123rd Airlift Wing; and Col. Steve Bullard, the wing's vice commander. Mr. Biden was in town to speak at the University of Louisville. (U.S. Air Force by Maj. Dale Greer)