The Antonov An-225 Mriya (Ukrainian: ??????? ??-225 ????, Russian: ??????? ??-225 ????, Dream, NATO reporting name: 'Cossack') is a strategic airlift cargo aircraft that was designed by the Soviet Union's Antonov Design Bureau in the 1980s. The An-225's name, Mriya (??i?) means 'Dream' (Inspiration) in Ukrainian. It is powered by six turbofan engines and is the longest and heaviest airplane ever built with a maximum takeoff weight of 640 tonnes. It also has the largest wingspan of any aircraft in operational service. The single example built has the Ukrainian civil registration UR-82060. A second airframe was partially built; its completion was halted because of lack of funding and interest.