A number of journalists considered the Iranian revenge motive (retaliation for the shooting down of the Iran Air Airbus by USS "Vincennes") to have been prematurely dismissed by investigators. They drew attention to a comment by former British prime minister Margaret Thatcher in her 1993 memoirs, where she seemed to discount the Libya revenge motive (for Operation El Dorado Canyon, the 1986 bombing of Tripoli and Benghazi by the United States Air Force):