The Ilyushin IL-76 (NATO reporting name: Candid) is a multi-purpose four-engined strategic airlifter designed by the Ilyushin design bureau. It was first planned as a commercial freighter in 1967. Intended as a replacement for the Antonov An-12, the IL-76 was designed for delivering heavy machinery to remote, poorly serviced areas of the USSR. Military versions of the IL-76 have seen widespread use in Europe, Asia and Africa, including use as an airborne refueling tanker or as a command center. The IL-76 has seen extensive service as a commercial freighter for ramp-delivered cargo, especially for outsized or heavy items unable to be otherwise carried. It has been used as emergency response transport for civilian evacuations and to deliver humanitarian/disaster relief aid around the world, especially to undeveloped areas due to its ability to operate from unpaved runways. Specialist models have also been produced for aerial fire-fighting and zero-G training.