Atomic War 1, 1952
Published by Ace Periodicals. This cover has... a nuclear bomb. A mushroom cloud. And Manhattan being devestated. I think it is Manhattan because I recognize the Chrysler Building in the foreground and I'm pretty sure that is the Empire State Building in the background. Fear of New York City being nuked was common during the Cold War. "Duck and Cover" was the standard warning for schoolchildren at the time and comics like this were for sale at the newsstand.