The United States Air Force (USAF) operates some of the largest aircraft in the world, although not the largest. The largest aircraft in US Air Force service are a mixture of purpose-built military aircraft, like bombers, and military versions of civilian aircraft, like the Boeing 747 Jumbo. The largest aircraft in the world today is the civil Airbus A380 Superjumbo. However, that is not in US Air Force service, and since the destruction of the Antonov An-225 Mriya, the world’s largest dedicated military aircraft is the Ukrainian/Russian Antonov An-124 Ruslan.