JOINT BASE ELMENDORF-RICHARDSON, Alaska -- Mike Walsh, a research mechanical engineer with the Cold Regions Research and Engineering Laboratory of Hannover, NH, opens a plastic bag containing a block of ice that will be used as a control subject in a high order detonation test in Eagle River Flats, Feb. 19, 2012. CRREL and the 716th Ordinance Company of JBER-R detonated 60mm mortars using C-4 to conduct tests on the effects of explosive residue on the environment surrounding the range. ( Air Force Photo/ Airman 1st Class Omari Bernard)

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Photo credit: © PJF Military Collection / Alamy / Afripics
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Keywords: air, airforce, army, crrel, environmental, eod, force, jber, military, states, united, usa