FILE - In this Wednesday, Aug. 21, 1991 file photo, a trolley bus that was used by anti-coup demonstrators to block the exit of Soviet armored personnel carriers from the area near the Soviet Foreign Ministry office burns during a verbal confrontation between demonstrators and Soviet soldiers standing atop an armored vehicle in downtown Moscow, Russia. The tensions remained high, however, and three protesters were killed and several others were wounded when a crowd of demonstrators tried to stop a convoy of armored vehicles they thought was heading to storm Yeltsin's headquarters. (AP Photo/Alexander Zemlianichenko, File)