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.
Takashi Nagai
On 9 August 1945, at 11:02 am, the second atomic bomb struck Nagasaki. At the time of the atomic bombing, Dr. Nagai was working in the radiology department of Nagasaki Medical College Hospital. He received a serious injury that severed his right temporal artery but joined the rest of the surviving medical staff in dedicating themselves to treating the atomic bomb victims. He wrote a 100-page medical report about his observations detailing the "concentric circles of death" around the epicentre of the blast.