Blood scale
A blood bag lays on a scale during a blood drive at Joint Base Andrews, Md., May 13, 2020. The blood is critical to direct combat support provided to warfighters from the point of injury through in-theater trauma hospitals and definitive care. (U.S. Air Force photo by Senior Airman Xiomara M. Martinez)

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Photo by: Senior Airman Xiomara M. Martinez  |  VIRIN: 200513-F-JT831-021.JPG