URL:https://cdn.britannica.com/37/183537-050-F43BFA6C/World-War-II-first-atomic-bombs-test-Los-Alamos-New-Mexico-detonation-Hiroshima-Nagasaki-Japan-1945.jpg
掲載元:https://www.britannica.com/story/discover-more-about-the-first-atomic-bombs-tested-and-used-during-world-war-ii