This is a poster
advertising a Civil Defense training class. This poster is dated 1955. The Hydrogen
Bomb was the latest thing and it was obvious that the only hope would be to
take cover from the Radioactive Fallout if you happened to be far enough from
the blast to survive. If you ever see the newsreel "Alert Today Alive Tomorrow"
pay attention. There is a quick shot of a guy posting one of these posters on