Ran across this while Googling for something else. NPR interviewed some of my colleagues about the master clock a while back. This aired in January 2007.

The Atomic Secrets of Accurate Time Keeping

I keep forgetting to use the bell ringing analogy when I explain how clocks work. (oh, and when the interviewer says “and his colleagues” near the end, she’s referring, in part, to me. Better than lackey or minion, I suppose.)