Secret Is Out: The U.S. Military Had a Plan to Nuke the Japanese Navy For a time before the bombings of Hiroshima and Nagasaki, the United States considered nuking the Japanese fleet at anchor — a kind of reverse, radioactive Pearl Harbor. Here's What You Need to Remember: Wartime studies of underwater explosions in support of the plan to nuke Chuuk helped plan Shot Baker, Crossroads’ underwater test. Baker produced what is perhaps the most iconic image of a mushroom cloud, its size made even bigger by its eruption from a vast lagoon, hurling seawater and coral reef and whole battle...