 Meanwhile, training of the first groups of Iranian crews by the U.S. Navy was underway in the US; one of these conducted a successful shoot-down with a Phoenix missile of a target drone flying at .Following the overthrow of the Shah in 1979, the air force was renamed the Islamic Republic of Iran Air Force (IRIAF) and the post-revolution Interim Government of Iran canceled most Western arms orders.In 1980, an Iranian F-14 shot down an Iraqi Mil Mi-25 helicopter for its first air-to-air kill during the Iran–Iraq War (1980–1988).