Following up on the question Public knowledge of hypothetical nuclear weapons before Hiroshima?:
I recall reading (many many years ago) an autobiographical anecdote by a science fiction author who was unable to check his own work out of a public library due to insufficient security clearance. I seem to recall that this occurred during World War 2, but it is possible it happened in the late 1940's or early 1950's.
Does anyone recall who this author was, and which story or novel was involved? Most of my once extensive SF collection disappeared with my ex, which inhibits my research on this.
Update - from my comment below
Okay - I implied (through the attached question) but failed to make explicitly clear that it was a story/novel involving knowledge of nuclear fission - yet not any of those stories currently referenced in that question.