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 main raid on Nagaoka occurred on 1 August 1945. Commencing at around 10:30 p.m. that night, 125 B-29 Superfortress bombers from the 313th Bombardment Wing struck the city with an estimated 163,000 incendiary bombs totaling 925 tons. The raid lasted for 1 hour and 40 minutes. The city suffered severe damage, though estimates of its extent vary: in 1953 the USAAF's official history stated that 65.5 percent of Nagaoka's urban area was destroyed, and this figure was also used by historian Richard B. Frank in 2001. However, in 2016 the "Washington Post" reported that 80 percent of Nagaoka had been burnt out. A total of 1,486 people were killed in Nagaoka, including more than 280 school age children. The American force that attacked Nagaoka did not suffer any casualties.