When Bockscar reached Kokura, Big Stink, with which it was scheduled to rendezvous, was nowhere to be seen. So Bockscar circled around, waiting for the film plane to show up. After 40 minutes of flying around, Major Sweeney gave up on Big Stink, and proceeded to Kokura. By then, however, clouds, plus smoke from a conventional bombing raid on a nearby city, had combined to obscure Kokura.
Over the next 50 minutes, Bockscar crisscrossed the skies above the target city, hoping for enough of a break in the cloud and smoke to drop its bomb. Below, the Kokurans went about their daily lives, innocently oblivious to the death circling above. After three failed bombing runs, Sweeney finally gave up, and flew at a new heading for his alternate target in case he was unable to bomb Kokura: Nagasaki. One city’s salvation proved to be another city’s doom.
Where Did We Find This Stuff? Some Sources and Further Reading