The largest and heaviest aircraft in the world is the Antonov An-225 Marija. It is a semi-engine transport machine that is currently in use. It has only one copy, construction of a new one has not been completed since 1994. It is able to take 250,000 kg. It was constructed because the Russians wanted to create a new one that would also be able to transport other machines on its back. It happened as early as 1989, when this person transported the Buran spacecraft. After more than 10 years of grounding, the plane began to fly this year. He even visited the Warsaw Chopin airport, providing, among other things, masks for the fight against the current Covid.