U.S. Air Force members watch as FBI special agents demonstrate how they would grid an area for a post-blast investigation at Beale Air Force Base, California, May 5, 2021. Other topics covered in the training included what to look for, how to properly collect evidence for laboratory analysis. (U.S. Air Force photo by Airman 1st Class Jason W. Cochran)

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Photo by: Airman 1st Class Jason W. Cochran |  VIRIN: 210505-F-BW249-1052.JPG