US Air Force/Airman Jonah Fronk The Air Force is divesting B-1B bombers, aiming to retire the fleet by the end of the 2030s. The bombers are considered "the workhorse of the Air Force today." At least one of the outgoing bombers will find new life as a lab to help keep other B-1s flying. In February, the Air Force announced that it will begin retiring the B-1B Lancer from service by divesting 17 bombers from the fleet of 62. The divestment is being done to cut costs, streamline modernization and maintenance for other aircraft, and prepare for the introduction of the Air Force's future B-21 Raider bomber.