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.
Niigata (city)
In 1945, near the end of the war, Niigata was one of four cities, together with Hiroshima, Kokura, and Nagasaki, picked as targets for the atomic bomb if Japan did not surrender. The governor of Niigata Prefecture ordered the people to evacuate as rumors of an impending bombing spread, and the city was completely deserted for days. Poor weather conditions and its distance from B-29 bases in the Mariana Islands meant that it was removed from the list of targets during deliberations; Nagasaki was bombed instead.