Liberty Bell
Col. Michael Underkofler, 514th Air Mobility Wing commander, delivers the oath of enlistment to 9 Freedom Wing Airmen and 14 new recruits at the Liberty Bell Center in Philadelphia, Pa., March 24. The Airmen pledged to serve and protect the Constitution of the United States in the same city where it was adopted by the Constitutional Convention on Sept. 17, 1787. Independence Hall, where the Declaration of Independence was signed, is visible through the window behind the Liberty Bell. (U.S. Air Force by Master Sgt. Donna T. Jeffries)