Knauf promoted to lieutenant colonel Published March 15, 2021 By Jill Pickett AEDC/PA ARNOLD AIR FORCE BASE, Tenn. -- Brian Knauf, retired Air Force lieutenant colonel, left, administers the oath of office to his brother, newly-promoted Lt. Col. Michael Knauf during a promotion ceremony, March 1, 2021, at Arnold Air Force Base, Tenn. (U.S. Air Force photo by Jill Pickett)
