Army Staff Sgt. Amna Ali uses an Chemical Agent Monitor (CAM) to scan soldiers for agents, during the 91st Training Division’s Warrior Exercise, on Fort Hunter Liggett, Calif. June 21, 2017. The CAM detects vapors of chemical agents by sensing molecular ions of specific mobilities (time of flight) and uses timing and microprocessor techniques to reject inferences. It can detect and discriminate between vapors of nerve and blister agents and display the relative concentration.

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Photo credit: © Dudley Little / Alamy / Afripics
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