MASTER SGT. Jocelyn Nixon measures a radiation level at the Armstrong Laboratory Occupational and Health Directorate where she is the superintendent of the instrument calibration facility. She is wearing a collar badge to gauge doses of radiation to the thyroid. Nixon works primarily with the air Force Dosimetry Program which distributes, collects, and reads radiation badges worn by Air Force X-ray workers in the medical, dental, and industrial fields. Published in AIRMAN Magazine October 1996