The document provides details about the Antonov An-225 Mriya aircraft, including:
1. It is the heaviest aircraft ever built, with a maximum takeoff weight of over 1.3 million pounds.
2. It has six powerful turbofan engines, can carry over 250,000 kg of cargo, and has a maximum range of over 9,500 miles when fully fueled.
3. Only two were built, with one currently in service with Antonov Airlines, primarily used for strategic heavy airlift of outsized cargo.