On this July 1, 1990 file photo the 28th Congress of the Communist Party of the Soviet Union at the Kremlin Palace of Congresses, July 2 - 13, 1990. President of the USSR, General Secretary of the Central Committee of the Communist Party of the Soviet Union Mikhail Gorbachev speaks during the congress. The ex-president of the USSR has died at the age of 91 after a serious and long illness on the evening of August 30.