"Top Secret. Special dossier. To Comrade Khariton Yu. B. About using the gadget for implosion of the supergadget RDS-6s. This report presents a preliminary schematic of a device for the AO of the supergadget and calculations evaluating its performance. The application of AO was proposed by V.A. Davidenko. The schematic."
Note: AO stands for atomic implosion.