#OnThisDay in 1941, Japan launched a surprise attack on the U.S. Naval base at Pearl Harbor. Here is newsreel footage of Japanese Admiral Isoroku Yamamoto's attack plan being carried out. | American History TV

This recently rediscovered newsreel was filmed at San Quentin State Prison in January 1942. The film makes frequent reference to the Dec. 7, 1941 attack on Pearl Harbor, which led to America entering World War II. Then-Warden Clinton Duffy narrates the film and emphasizes the SQSP inmates' eagerness to participate in the war effort after the attack. Some inmates even volunteered as an organized suicide squadron to help defend the nation. While they weren't permitted to fight in the war, inmates