(Lt. Col. Stephen Murphy (Right), Army Corps of Engineers Nashville District commander, briefs soldiers from the Tennessee National Guard as a security assistance exercise kicks off to protect the Old Hickory Dam Powerhouse and Switchyard in Hendersonville, Tenn., June 20, 2016. (USACE photo by Leon Roberts) National Guard conducts security assistance exercise at Old Hickory Dam 160620-A-EO110-001

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Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
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