For battlefield acupuncture, Niemtzow uses only five points on each ear. Small, 1-millimeter gold or stainless steel needles are inserted and stay in place until they fall out or the patient removes them several days later. Colonel Renata J. M. Engler, MD Director, Vaccine Healthcare Center Network Allergy-Immunology learns how to do it during a workshop at the Air Force Acupuncture Center at Joint Base Andrews in Maryland, Dec. 9, 2010. The purpose of the class was to teach battlefield acupuncture to military physicians from Walter Reed Army Medical Center.