Coming three years later in the same magazine, Cleve Cartmill’s “Deadline” provoked astonishment in the lunch table discussions at Los Alamos. It really did describe isotope separation and the bomb itself in detail, and raised as its principal plot pivot the issue the physicists were then debating among themselves: should the Allies use it? To the physicists from many countries clustered in the high mountain strangeness of New Mexico, cut off from their familiar sources of humanist learning, it must have seemed particularly striking that Cartmill described an allied effort, a joint responsibility laid upon many nations.
Discussion of Cartmill’s “Deadline” was significant. The story’s detail was remarkable, its sentiments even more so. Did this rather obscure story hint at what the American public really thought about such a superweapon, or would think if they only knew?
Talk attracts attention, Teller recalled a security officer who took a decided interest, making notes, saying little. In retrospect, it was easy to see what a wartime intelligence monitor would make of the physicists’ conversations. Who was this guy Cartmill, anyway? Where did he get these details? Who tipped him to the isotope separation problem? “and that is why Mr. Campbell received his visitors.”