"Of the 8,000 active or operational U.S. warheads, 2,000 are on hair-trigger alert, ready to be launched on 15 minutes’ warning. How are these weapons to be used? The United States has never endorsed the policy of “no first use,” not during my seven years as secretary or since. We have been and remain prepared to initiate the use of nuclear weapons—by the decision of one person, the president—against either a nuclear or nonnuclear enemy whenever we believe it is in our interest to do so."
It makes interesting reading.