Antonov is a Ukrainian airplane manufacturer best known for its huge freighter planes An-124 Ruslan and An-225 Mriya. The An-225 is the largest airplane in operational service ever. It was designed for the Soviet Buran space program. Due to the collapse of the Soviet Union in 1991 and the cancellation of the Buran space program only one plane had been finished. Today this plane is in use as a freighter that can transport exceptionally large and heavy loads all over the world.