Marine Corps Lt. Col. Chris Haar (left), commanding officer, and Sgt. Maj. John Lewis (right), sergeant major of 1st Combat Engineer Battalion (CEB), 1st Marine Division, speak to Marines during Mountain Training Exercise (MTX) 2-17 at the Marine Corps Mountain Warfare Training Center, Bridgeport, Calif., Mar. 17, 2017. 1st CEB completed the final exercise of MTX 2-17, a three-part cycle consisting of avalanche initiation, ice breaching, obstacle emplacement and tree cutting using explosives.

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Photo credit: © Chuck Little / Alamy / Afripics
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