Russian media: Ex-Soviet leader Mikhail Gorbachev dead at 91

FILE - Mikhail Gorbachev flashes the decree relinquishing control of nuclear weapons to Russian President Boris Yeltsin after its signature at the Kremlin in Moscow on Wednesday, Dec. 25, 1991. It was a momentous event that ended an era 30 years ago - Soviet President Mikhail Gorbachev's resignation drawing a line under the USSR's existence. The AP Moscow photo chief, Liu Heung Shing, was the only foreign photographer who captured the final moments of the Soviet Union on Dec. 25, 1991. (AP Photo/Liu Heung Shing, File)