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Oppenheimer spoiler
The first chapter in John Hersey's 1946 essay published in The New Yorker entitled "Hiroshima" is called A Noiseless Flash.
During the Trinity Test sequence I uttered "A Noiseless Flash" right there in the theater.
Here's John Hersey's essay if you want to read it. It's lengthy for an essay but I've read it in one sitting several times.