The Rockwell B-1 Lancer is a supersonic strategic bomber used by the United States Air Force. Designed in the 1970s, it features a variable-sweep wing design, allowing it to adapt its shape for different flight speeds. The B-1 can carry a wide range of weapons, including nuclear and conventional bombs, making it a versatile platform for various military missions. The aircraft is powered by four turbofan engines, enabling it to fly at high speeds and altitudes. With a crew of four, the B-1 Lancer is known for its ability to penetrate enemy defenses and deliver precision strikes, contributing significantly to modern aerial warfare capabilities.