These odd NSA motivational posters from the 1960s look like props from The Prisoner

Here's a link to a PDF of declassified NSA posters obtained via a FOIA. The posters, which range from the 1950s to the 1970s, combine threats delivered in a tone of forced cheerfulness and a design aesthetic that feels like it came from East Berlin commercial artists who had never seen other countries' graphic design but were given text descriptions of what it looked like. — Read the rest