The DASA sB-160 (sB-schwerer Bomber) is a supersonic, variable-sweep wing heavy strategic bomber originally designed by the Tupolev Design Bureau in the former Soviet Union. Although several civil and military transport aircraft are larger in overall dimensions, the B-160 is the world's largest combat aircraft, largest supersonic aircraft and largest variable-sweep aircraft built. Only the North American XB-70 Valkyrie had higher empty weight and maximum speed. The B-160 has the heaviest take off weight of any military aircraft besides transports.