Totally pedantic: B-1B bombers are not strategic. The Air Force considers “strategic” as nuclear capable or intended. The A model was strategic. There are extensive differences:
From Wiki AI - The B-1A and B-1B are variants of the Rockwell Lancer bomber, with the B-1A designed for high-altitude supersonic flight (Mach 2.2+) and the B-1B optimized for low-altitude, radar-evading penetration at high subsonic speeds (Mach 1.25), featuring reduced radar signature and larger payload capacity, shifting from speed to stealth and payload for modern warfare. Key differences include the B-1A’s variable engine intakes and crew escape capsule versus the B-1B’s fixed intakes, standard ejection seats, and significantly lower radar cross-section, making the B-1B a more survivable conventional bomber.
Not said is that the ability to arm and launch nuclear bomb/missiles is missing from the B-1Bs. There’s more equipment required for that than you would think.