Air Force Staff Sgt. Raul Loyo, a laboratory technician with the 509th Medical Group, checks expiration dates on gram stain supplies at Whiteman Air Force Base, Mo., Feb. 20, 2013. Airman 1st Class Keenan Berry

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Photo credit: © PJF Military Collection / Alamy / Afripics
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Keywords: 509th, air, airforce, force, mdg, military, states, united, usa, usaf