The National Archives at Atlanta, 5780 Jonesboro Road, Morrow, will host a symposium Saturday about Oak Ridge, Tn. “The Secret City in the Tennessee Hills: From Dogpatch to Nuclear Power” looks at the formation of the East Tennessee City which was the largest of the Manhattan Project “secret” cities. Oak Ridge is where parts of the atomic bomb were built during World War II.

The archives houses the largest holdings of the Atomic Energy Commission records in the nation. Saturday’s event runs from 9 a.m. to 3:30 p.m. and will cover the history of the city and its power war boom into nuclear power. Pre-registration is required and free. Lunch will be provided. The event is limited to 200 people.

To register: E-mail joel.walker@nara.gov or call 770-968-2530.