Cika wannan magana: An sauya Koval daga Oak Ridge zuwa wani dakin bincike na sirri a Dayton, Ohio a ranar 27 ga Yuni, 1945, inda aka kera polonium initiators. An harba bam din nukiliya na farko a duniya a New Mexico a ranar 16 ga Yuli na wannan shekarar. An jefa bama-baman nukiliya a kan Japan a ranar 6 ga Agusta da 9, wanda ya kai ga
Japan ta mika wuya da kuma karshen yakin duniya na biyu. Soviet Union ta amsa ta wajen ƙara ƙoƙarce-ƙoƙarce don ta ƙera nata bam ɗin nukiliya. Yayin da Hukumar Leken Asiri ta Amurka ta kiyasta cewa Soviets ba za su yi nasara ba har zuwa 1950-1953, bam din bam na farko na Soviet ya fashe a ranar 29 ga Agusta, 1949. A cewar jami'an sojan Rasha, wanda ya fara yin bam din plutonium, "an shirya shi ne bisa ga 'girke-girke' da jami'in leken asirin soja Delmar [Koval] ya bayar".