This year, the National Security Agency (NSA) is celebrating its 60th year in existence.
To commemorate the anniversary, the agency has produced a book that is in some places referred to simply as an “Anniversary Book” but in other places referred to as a “Memory Book,” which sounds a great deal more sentimental.
The book is available digitally here: http://www.nsa.gov/about/cryptologic_heritage/60th/book/NSA_60th_Anniversary.pdf
My favorite photo is this one:
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