Robert O’Brien, a detective assigned to the 28th Security Forces Squadron, dusts for fingerprints on a knife at Ellsworth Air Force Base, , Nov. 10, 2016. The unique pattern of individual human prints was discovered during the 19th century by Henry Faulds while working as a medical missionary in Japan and is critical to identifying persons when conducting investigations.

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Photo credit: © Conner Flecks / Alamy / Afripics
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Keywords: 28th, afb, afgsc, air, archive, armed, bomb, defence, detective, ellsworth, force, forces, investigation, military, reportage, saftey, security, servicemen, usa, wing