ELLSWORTH AIR FORCE BASE, S.D. -- Chief Master Sgt. Brian Lavoie, 28th Operations Group superintendent, takes the Oath of Enlistment at his 26-year career mark at Ellsworth Air Force Base, S.D., Aug. 27. Chief Lavoie took the Oath of Enlistment over a video teleconference, while his son, U.S. Navy Ensign Paul Lavoie, swore him in aboard the U.S.S Pearl Harbor. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)