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The B-1 Lancer is a variable-sweep, four-engine strategic bomber used by the United States Air Force (USAF). It is one of the three strategic bombers in the USAF fleet, alongside the B-2 Spirit and B-52 Stratofortress. The Rockwell B-1 Lancer was initially developed in the 1960s as a supersonic bomber with a speed of Mach 2.
The B-1 Lancer is a variable-sweep strategic bomber powered by four jet engines. The only country operating this aircraft is the United States, and the USAF currently operates approximately 65 units of the B-1B Lancer. The USAF plans to continue operating the B-1 Lancer fleet at least until 2028 or 2030.
Originally, in the 1960s, the B-1 was designed as a supersonic bomber with a speed of Mach 2, long range, and the capability to carry a large amount of weapons, intended to replace the previous generation of strategic bombers like the B-52 Stratofortress. However, the replacement aircraft was later developed as the B-1B Lancer, which has a speed of Mach 1.25 and low-altitude penetration capabilities.