Today the presentation of the book "Nord-Ost. An Unfinished Investigation" took place. It is based on the results of an investigation conducted by people who suffered as a result of the terrorist attack at the Dubrovka Theater Center. Relatives of the victims are demanding official recognition that the hostage rescue operation ended in failure. They claim that facts and dates were falsified. In addition, the chemical composition of the gas is still unknown. All collected materials will be transferred to the embassies of the G8 member countries.