9/14/2012 - Capt. Matthew Killingsworth, 2nd Dental Squadron general dentist, performs a routine cleaning on a patient at Barksdale Air Force Base, La., Sept. 14. The 2 DS performs a variety of procedures for active duty members and national guard and reserve personnel on orders including making crowns and molds, routine check-ups and oral surgery. (U.S. Air Force photo/Senior Airman Sean Martin) (RELEASED)