ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Charles Canfield, 28th Communications Squadron ground radio technician, lowers a boom lift after replacing a speaker driver on one of the base speakers, Nov. 6. The speakers being repaired are one of many on base which plays taps, reveille, retreat and warnings. (U.S. Air Force photo/Airman 1st Class Matthew Flynn)