In the immediate postwar years, the Manhattan Project conducted weapons testing at Bikini Atoll as part of Operation Crossroads, developed new weapons, promoted the development of the network of national laboratories, supported medical research into radiology and laid the foundations for the nuclear navy.
Nos anos inmediatamente posteriores á guerra o Proxecto Manhattan levou a cabo varias probas de armamento no atol Bikini como parte da operación Crossroads, desenvolveu novas armas, promocionou o desenvolvemento da rede de laboratorios nacionais, apoiou a investigación médica sobre a radioloxía e cimentou as bases da armada nuclear.