This book is the first story of the Chernobyl disaster from the explosion on April 26, 1986 to the closure of the station in December 2000. What was Chernobyl for Ukraine? A national tragedy, a huge psychological trauma, a heavy burden on the economy. Chernobyl exploded not only because of staff mistakes, neglect of safety rules and problems with the design of the reactor, but also because of the system that shielded nuclear energy with a veil of secrecy. The Soviet system did not allow the dissemination of information about previous accidents, even among experts. This made a new large-scale accident inevitable. Today, Chernobyl-type reactors are no longer being built, but authoritarian regimes that have full control over the information still exist. After all, Ukraine still produces almost 50% of all electricity at nuclear power plants. We have something to share with the world about the Chernobyl experience, but we also have something to think about.