Duck and Cover

• The overt message is to "duck and cover" when the atomic bomb detonates.
• I didn't notice any sort of covert message in the video. It seemed purely informational.
• It was simply a persuasive message because there were no hidden messages that weren't told to the viewer up front. This video was merely meant to serve as an education device for kids so that they might know what to do in the case of an atomic bomb detonation. The video might be misleading by suggesting that ducking and covering will always save one's life, but I don't think that makes it propaganda.