The Ukrainian Air Force (, "Povitryani Syly Ukrayiny") is a part of the Armed Forces of Ukraine. The Ukrainian Air Force headquarters is located in the city of Vinnytsia. When the Soviet Union dissolved in 1991, many aircraft were left on Ukrainian territory. Ever since, the Ukrainian Air Force has been downsizing and upgrading its forces. The main inventory of the air force still consists of Soviet-made aircraft. Currently 36,300 personnel and 144 aircraft are in service in the Ukrainian Air Force and Air Defense forces but approximately only eighty aircraft are airworthy. All ICBMs and strategic bombers have been taken out of service (some however were given to Russia).