 Nyorai kuenderera mberi kweiyi ndima - Firimu iri rinoratidza upenyu hwevanhu vari muOzyorsk, Chelyabinsk Oblast, inozivikanwawo seOzersk, ine zita rekuti Guta 40. Guta racho riri pedyo neMayak, nzvimbo yakaberekerwa purogiramu yezvombo zvenyukireya yeSoviet Union uyewo nzvimbo yenjodzi yeKyshtym. Guta racho rakagadzirwa maererano nemapurani akabiwa kuUnited States, ayo akagadzira maguta awo epachivande eatomu. Vanhu vanogara muOzersk vanodavira kuti vari kuponesa nyika. Vanovharirwa nemasvingo ane tambo dzine minzwa namasuo anochengetedzwa zvakasimba, asi vane mikana iri nani kupfuura yevose yokutenga zvokudya nezvimwe zvinopiwa izvo vagari vari kunze kweguta vasina. 