How U.S. Removed Half a Ton of Uranium From Kazakhstan
washingtonpost.com
washingtonpost.com
The story is interesting history. I don't see any reason why having this information available at this point reveals anything useful to our the U.S.'s enemies. The U.S. made it perfectly clear it was on a mission to secure nuclear weapons and materials after the Soviet Union fell. The fact that it actually did secure some weapons and nuclear material simply shows they were at least partially effective. To me that increases credibility.
Like programmers might say "Google used to be very cool 5 years ago but these days is just a cube farm", I can imagine people in the spy business saying "The Americans were really good, but after they got into Iraq and Afghanistan, they've been slipping" or something like that.
How people like us ever get to hear an opinion like that is a different question entirely.