Public domain
Office of Civilian Defense workers help protect nation's capital. Typical of many air raid sirens located in every city, this siren at Howard University, Washington, D.C., screams out its warning at the approach of enemy planes
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineOffice of Civilian Defense workers help protect nation's capital. Typical of many air raid sirens located in every city, this siren at Howard University, Washington, D.C., screams out its warning at t. 1943-01-01. United States. Office Of War Information, Smith, Roger. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
