Staff Sgt. Brian Burns, right, combat instructor, Infantry Training Battalion, School of Infantry East, instructs students on how to assemble a grape charge during a demolition exercise at ETA-7 demolition training range on Marine Corps Base Camp Lejeune, , Jan. 11, 2018. This exercise was held to demonstrate different demolition and explosive breaching training techniques, and to develop proficiency in mobility support to infantry units. ( Marine Corps

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