What is propaganda of duck and cover?

Answer 1

It means to duck your head and cover it. "Duck and cover" was not propaganda; it was the method popularized by the United States in order to keep people safe in case of an atomic bombing.

Answer 2

Duck and cover was a Propaganda campaign during the Cold War era in the United States. The campaign encouraged citizens to protect themselves in the event of a nuclear attack by quickly seeking cover, typically under desks or tables. It was designed to promote a sense of preparedness and safety during the threat of nuclear war.