B-1A Lancer airplane modelUSAF B 1 Lancer airplane model. The B 1 is a multi role, long range bomber, capable of flying intercontinental missions without refueling, then penetrating present and predicted sophisticated enemy defenses. It can perform a variety of missions, including that of a conventional weapons carrier for theater operations. Through 1991, the B 1 was dedicated to the nuclear deterrence role as part of the single integrated operational plan (SIOP). Converting