 Nyorai kupfuurira kweiyi ndima - Maererano neGreenpeace, United States neUSSR dzainetseka zvakakwana netsaona dzakadai sekuparara kweGoldsboro B-52 muna 1961, kuparara kwePalomares B-52 muna 1966uye tsaona yeThule kuti vakabvumirana kutora matanho okuvimbisa kuti tsaona yenyukireya yeramangwana yaisazotungamirira rumwe rutivi kugumisa zvisiri izvo kuti kurwisa kwokutanga kwakanga kuri kuitika. Somuuyo, pana September 30, 1971, masimba makuru maviri akanyorerana Chibvumirano Pamusoro peZviito Zvokuderedza Ngozi Yehondo Yenyukireya. Rutivi rumwe norumwe rwakabvumirana kuzivisa rumwe nokukurumidza muchiitiko chechiitiko chetsaona, chisina kubvumirwa kana chisina kutsanangurwa chinobatanidza chombo chenyukireya icho chingawedzera ngozi yehondo yenyukireya. Vakabvumirana kushandisa hotline yeMoscow-Washington, iyo yakagadziridzwa panguva imwe cheteyo, nokuda kwekurukurirano ipi neipi. 