Soldiers assigned to 579th Engineer Battalion prepare to detonate an improvised Bangalore explosive during excavation operations at Combat Support Training Exercise 91-17-03 July 15, 2017 on Camp Roberts, CA. CSTX is a 91st TD led exercise designed to assist combat-service and combat-service-support units in planning, preparing, supervising and executing of pre-mobilization collective training.

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Photo credit: © Bob Collet / Alamy / Afripics
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