Hillary Greenbaum has the story of the two NASA logos: The classic and current Meatball and the discarded Worm. It details the most absurd conversation between NASA Administrator Dr James Fletcher and Deputy Administrator Dr George Low:
Fletcher: I'm simply not comfortable with those letters, something is missing. Low: Well, yes, the cross stroke is gone from the letter A. Fletcher: Yes, and that bothers me. Low: Why? Fletcher: (long pause) I just don't feel we are getting our money's worth!
The Worm was introduced anyway. Then, a few years after this conversation, the Meatball was restored in all its retro glory. Personally, I love them both. [The 6th Floor]