The KC-46 Pegasus is a U.S. air-refueling tanker that is produced by Boeing. 

The KC-46 is intended to replace the first third of the U.S. Air Force (USAF) KC-135 fleet in the primary role of air-refueling, as well as in secondary roles of transport and aeromedical evacuation. Compared to the KC-135, the new aircraft can deliver more fuel at all ranges; operate from shorter runways; and carry three times as many cargo pallets, twice the number of passengers and over 30% more aeromedical evacuation patients.