National Guard conducts security assistance exercise at Old Hickory Dam
Soldiers with the Tennessee National Guard’s 269th Military Police Company, 117th Military Police Battalion, 194th Engineer Brigade, clear a U.S. Postal Service worker delivering mail to the Corps of Engineers during a security assistance exercise kicks off to protect the Old Hickory Dam Powerhouse and Switchyard in Hendersonville, Tenn., June 20, 2016.