3 ms·

I don't know old you are but duck and cover drills were a thing in the Bay Area well into the 80s (although typically for earthquakes not warfare).

• njarboe 7y ago
  Yes, nuclear duck and cover drills is what I was referring to.
• asdff 7y ago
  And if you ask anyone who was in school during duck and cover, they would tell you they took it about as seriously as a tornado drill.