1. Preemption (fire before the other guy; only suckers wait)
2. Launch on Warning (high certainty enemy attack procedures are in motion)
2.5 Launch Under Attack (evidence that enemy strikes are happening) /4
(1) US nuclear policy since 1960 has been stupidly and even dangerously weak;
(2) We must decide now to blow up any small-size nuke threat at will if we can get to it;
(3) and we can only do (2) with a nuclear weapon.
Her critics, not so much.