The First Congress of People's Deputies of the Soviet Union. The Kremlin Palace of Congresses. May 25-June 9, 1989. Mikhail Gorbachev, general secretary of the Central Committee of the Communist Party of the Soviet Union and chairman of the presidium of the USSR Supreme Soviet, center, with Vitaly Vorotnikov, chairman of the presidium of the RSFSR Supreme Soviet, left, and Anatoly Lukyanov, first deputy chairman of the USSR Supreme Soviet, right, during the opening of the congress.