The Rockwell B-1 Lancer is a supersonic variable-sweep wing, heavy aircraft used by the United States Air Force (USAF). It is commonly called the "Bone" (from "B-One"). The USAF had 66 B-1Bs in service as of September 2012. The B-1B is expected to continue to serve into the 2030s, with the Northrop Grumman B-21 Raider to begin replacing the B-1B after 2025. The B-1s currently in inventory will reach the end of their service lives by 2045. Video Credits: U.S. Air Force | United States Department of Defense ►Subscribe Now -- https://www.youtube.com/channel/UCT4layPPCzgR_99g5VYYvmQsub_confirmation=1