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200803-F-IM475-1007
U.S. Air Force Tech. Sgt. Steve Zavala, 422nd Medical Squadron medical operations flight chief and trusted care champion, poses for a photo in front of the 422nd MDS building at RAF Croughton, England, August 3, 2020. Zavala discovered a COVID-19 testing technique that needed to be changed, so he elevated the concern and impacted testing procedures across the Department of Defense. (U.S. Air Force photo by Airman 1st Class Jennifer Zima).