Dimitri Khalezov, a former officer of the Soviet nuclear intelligence, explains true mechanics of pulverisations of the Twin Towers & the WTC-7, as well as existence of a secret nuclear demolition scheme of the World Trade Center in New York & of the Sears Tower in Chicago. Detailed explanations about 'ground zero' name, 'Doomsday Plane', the Pentagon missile. Perfect answer for questions by the 'Architects and Engineers for 9/11 Truth'. Practically no question is left of the 9/11 mystery.