A single "boomer" has enough nuclear (nukular)firepower to destroy the world. We can launch from anywhere in the world.
That's a slight exageration. However, one boomer could launch enough missiles and warheads that if they reached their targets, and had high reliability, they could blow huge holes in an adversary's strategic capabilities. They keys would be firstly to avoid allowing the boomer to be surprise attacked and destroyed prior to targetting and launch of missiles, and secondly to either evading, or, proactively destroying using other tactics, any ABM systems the adversary presented.