Duck and Cover

The overt message is to be prepared when an atomic bomb hits. The repeated use of "duck and cover" shows that it is obvious in its message. It chooses to leave out one important piece of information, though. This is that you will die if an atomic bomb explodes near you. The absence of this information pushes the point that you should still duck and cover and persuades people to always be prepared and dissuades people from panicking. But, I still think it is mostly persuasion due to the way it is up front and instructional in its message. It isn't propaganda because they don't purposefully try to make any covert messages. They inadvertently say that our enemies are going to bomb us, with no doubt about it. they made it seem like a natural disaster rather than a preventable threat. They anted to prevent madness and the way they made it seem survivable keeps people calm and safer which is one of the goals of the video.