Not true. It's a proper noun, like "McDonald's". It just happens to also sound like a descriptive phrase. You'll find that, inside the agency, it is just "NSA

Not true. It's a proper noun, like "McDonald's". It just happens to also sound like a descriptive phrase. You'll find that, inside the agency, it is just "NSA" and not "the NSA". This is true for most "three letter agencies". Don't believe it? See what the agency calls itself on its website: http://www.nsa.gov/ http://www.nsa.gov/