Operation Crossroads
There were only seven nuclear bombs in existence in July 1946. The two bombs used in the test were Fat Man plutonium implosion-type nuclear weapons of the kind dropped on Nagasaki. The "Able" bomb was stenciled with the name "Gilda" and decorated with an "Esquire" magazine photograph of Rita Hayworth, star of the 1946 movie, "Gilda". The "Baker" bomb was "Helen of Bikini." This femme-fatale theme for nuclear weapons, combining seduction and destruction, is epitomized by the use in all languages, starting in 1946, of "bikini" as the name for a woman's two-piece bathing suit.
Bombing of Nagaoka
The took place on the night of 1 August 1945, as part of the strategic bombing campaign waged by the United States against military and civilian targets and population centers in the Japan home islands during the closing stages of World War II. Between 65.5 and 80 percent of the urban area of Nagaoka was destroyed during the bombing.