Final answer:
On August 6, 1945, an atomic bomb was dropped on Hiroshima, which marked a major turning point in history and led to Japan's surrender in World War II.
Step-by-step explanation:
On August 6, 1945, an atomic bomb was dropped on the Japanese city of Hiroshima. This event jeopardized the voyage because it marked the beginning of the end for Japan in World War II. The devastating impact of the bomb led to Japan's surrender, which eventually ended the war. This is important because it was a major turning point in history and showcased the destructive power of nuclear weapons.