One hundred years ago, on December 30, 2022, the Union of Soviet Socialist Republics was created. For three decades this state has not been on the map of the world, but many Russians recall it with sympathy. According to the study of the Levada Center, in December 2021, shortly before Russia's invasion of Ukraine, 63 percent of the respondents regretted the collapse of the USSR. What was good in the USSR and what bad? Do you regret the collapse of the Soviet Union? Is it possible to revive the USSR? Our correspondents asked for such questions to answer residents of three Siberian cities.