However, the other Allies were unaware that Soviet intelligence had penetrated the Manhattan Project in its early stages, so Stalin already knew of the existence of the atomic bomb but did not appear impressed by its potential.
Namun, Sekutu lainnya tidak menyadari bahwa intelijen Soviet telah menyusup dalam Proyek Manhattan pada tahap awal, sehingga ketika Stalin mengetahui keberadaan bom atom, ia tidak terkesan dengan potensinya.