What was “duck and cover”?

Responses

a slogan and song that taught a defensive posture in case of atomic attack
a children’s game that some interpret as an allegory of the atomic age
an easy-to-prepare dish that could be served in air-raid shelters
a television show about a group of soldiers in a bomb-testing unit

"duck and cover" was a slogan and song that taught a defensive posture in case of atomic attack.