N'afọ ahụ, Soviet Union gbagburu bọmbụ atọm mbụ ya, na-emepụta hysteria nke ndị na-emegide ọchịchị Kọmunist. Mgbe e jidere Fuchs dị ka onye nledo Soviet na 1950, FBI jụrụ Bethe ajụjụ banyere iguzosi ike n'ihe Feynman. A na-ejide onye ọkà mmụta sayensị bụ David Bohm na Disemba 4, 1950 wee kwaga na Brazil na Ọktọba 1951. Enyi nwanyị gwara Feynman na ya kwesịkwara ịtụle ịkwaga South America. O nwere ezumike na-abịa maka 1951<unk>52, wee họrọ iji ya na Brazil, ebe ọ na-enye ọmụmụ ihe na Centro Brasileiro de Pesquisas Físicas. Na Brazil, Feynman nwere mmasị na egwu egwu, ma mụta igwu egwu egwu egwu egwu, nke a na-akpọ bongo frigide. Ọ bụ onye na-anụ ọkụ n'obi na-eme ihe nkiri na-eme ihe nkiri na Cornell na-eme ihe nkiri na-eme ihe nkiri na-eme ihe nkiri na-eme ihe nkiri na-eme ihe nkiri na-eme ihe nkiri na Brazil. Ọ bụ onye na-eme ihe nkiri na-eme ihe
Ọktoba 1951