An instructional short aimed at school-aged children of the early 1950s that combines animation and live-action footage with voice-over narration to explain what to do to increase their chances of surviving the blast from an atomic bomb.

"Our Cities Must Fight" is a civil defense film that was produced for the U.S. government to illustrate the importance of not abandoning urban centers during an atomic bombing. The film cautions that doing so would make it easier for the invading "enemy."