 Kọ itẹsiwaju fun paragirafi yii - Ni ọdun 1971, awọn atukọ Soyuz 11 Georgy Dobrovolsky, Vladislav Volkov, ati Viktor Patsayev ṣe igbohunsafefe ibo wọn lati ibudo aaye Salyut 1 ni idibo fun Igbimọ 24th ti Communist Party of the Soviet Union : ó ṣe tán. Iroyin kan lati UPI ni akoko naa sọ pe awọn ibo wọn ni akọkọ ti a fi silẹ lati aaye. 