 Nyorai kupfuurira kweiyi ndima - Muna 1948 akatamira kuUnited States, achitora nzvimbo saPurofesa wePhysics paSyracuse University, inenge iri pakati peBuffalo neAlbany muUpperstate New York. Ikoko akatanga kutsvakurudza mune zvenyukireya uye mwaranzi yomuchadenga. Muna 1953 akava nhengo yeNew York Academy of Sciences. Muzera reMcCarthyism, Sitte akanga ari chinhu chekushamiswa kwepamutemo mumakore ake muUnited States, zvose zviri zviviri nekuda kwezvematongerwe enyika ake ekuruboshwe muma1930 uye nekuda kwekubatana kwaaive akachengetedza neCzechoslovak communists waaziva kubva panguva yake muBuchenwald, uye waakaramba achishanyira kunyange mushure mekutora kweCommunist.muna 1948. Kwakanga kuri pakurudziro yeFBI kuti muna 1953 mvumo yokugara yaSitte haina kuvandudzwa, uye nokudaro akatamirazve, panguva ino kuBrazil. Akatora nzvimbo yokudzidzisa somupurofesa anoshanyira paYunivhesiti yeSão Paulo. Nokukurumidza pashure pacho kuiswa kwake pazvinyorwa zvengozi dzokuchengeteka kwakasimbiswa apo akabhuka ndege yokuRoma iyo yaibatanidza kutama muNew York City. Apo Sitte akabvunza kana aigona kugara pahotera usiku masimba eNew York akaramba chikumbiro chake, akamuisa pasi pokurindwa kwakasimba namapurisa, uye akamupinza mundege yokutanga yakanga iripo yokubuda munyika, iyo yakamuendesa kwete kuItaly, asi kudzokera kuBrazil. 