" Or, to quote an example from Mr. Rosengren: "Two days after a U.S. B-29 dropped the first atomic bomb on Hiroshima, Hank collected three hits, including two doubles, in the first game of a twin bill at Briggs Stadium against the Red Sox.

WSJ: Book Review: Hank Greenberg

What did happen was that the Enola Gay, an American B-29 bomber, dropped a uranium-based atomic bomb on the Japanese city of Hiroshima.

FORBES: The Nuking Of Japan