The history of the creation of the Soviet atomic bomb for half a century remained one of the most mysterious and dramatic events that gave rise to various myths. Some extolled the merits of foreign intelligence, which obtained everything that could be stolen from the Los Alamos laboratory, the holy of holies of the American project, others defended the complete independence of our scientists. Readers will find out what the truth is by reading the story “Illegals,” written by professional counterintelligence officer Vladimir Chikov. The author strictly follows the facts and documents of the first declassified dossier of the KGB of the USSR No. 13676 entitled “Enormous”, which contains materials classified as “Top Secret”, “Keep Forever”, “In case of danger - burn.”