Largest aircraft in the world [Quiz]

Aviation Quiz strategic_airlifter_antonov_an-225_mriya.jpg
Sergey Kohl

The question of what is the largest aircraft in the world should be an easy one. After all, the title implies that it a) should be huge and b) hanging in the air. However, it is not quite so simple, as aircraft size can be measured in various different ways, not to mention the various types of aircraft that exist: the largest military plane, the largest passenger aircraft and so on. 

Quiz is 23