Anti-aircrafter gunners practice loading an Autcannon gun, also known as the ack-ack gun as part of the the civil defense efforts to protect the Capital.
U.S. National Park Service
Anyone with additional information about the locations of the civil defense posts please contact the National Capital Museum Resource Center [MRCE] at mrce_admin@nps.gov
This digital asset is in the public domain. When publishing this asset for any use, including online, image must credit: National Capital Region Public Affairs Photo Collection, Photographer Abbie Rowe, NCRO 6