A Soldier assigned to the 650th Military Intelligence Group makes an ok sign to signify that the remaining filter of his M50 joint services general purpose mask works properly as the unit practices Chemical Biological Radiological Nuclear defense in the Training Support Center Benelux facilities, on Chièvres Air Base, Belgium, Sep. 27, 2016. ( Army photo by Visual Information Specialist Pierre-Etienne Courtejoie)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: 650th, battle, biological, cbrn, chemical, cs, defense, drills, gas, general, group, joint, m50, mask, mi, nato, nuclear, purpose, radiological, service, tasks, training, warrior