The Rockwell B-1 Lancer is a supersonic variable-sweep wing, heavy #bomber used by the United States #AirForce. It is commonly called the “Bone”. It is one of three strategic bombers in the #USAirForce fleet as of 2018, the other two being the B-2 Spirit and the B-52 Stratofortress.

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Credit to : Airman John Ennis 28th Bomb Wing Public Affairs