It is time—well past time, in my view—for the United States to cease its Cold War-style reliance on nuclear weapons as a foreign-policy tool. At the risk of appearing simplistic and provocative, I would characterize current U.S. nuclear weapons policy as immoral, illegal, militarily unnecessary, and dreadfully dangerous. The risk of an accidental or inadvertent nuclear launch is unacceptably high. Far from reducing these risks, the Bush administration has signaled that it is committed to keeping the U.S. nuclear arsenal as a mainstay of its military power—a commitment that is simultaneously eroding the international norms that have limited the spread of nuclear weapons and fissile materials for 50 years. Much of the current U.S. nuclear policy has been in place since before I was secretary of defense, and it has only grown more dangerous and diplomatically destructive in the intervening years.

Today, the United States has deployed approximately 4,500 strategic, offensive nuclear warheads. Russia has roughly 3,800. The strategic forces of Britain, France, and China are considerably smaller, with 200–400 nuclear weapons in each state’s arsenal. The new nuclear states of Pakistan and India have fewer than 100 weapons each. North Korea now claims to have developed nuclear weapons, and U.S. intelligence agencies estimate that Pyongyang has enough fissile material for 2–8 bombs.

How destructive are these weapons? The average U.S. warhead has a destructive power 20 times that of the Hiroshima bomb. 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. For decades, U.S. nuclear forces have been sufficiently strong to absorb a first strike and then inflict “unacceptable” damage on an opponent. This has been and (so long as we face a nuclear-armed, potential adversary) must continue to be the foundation of our nuclear deterrent.

In my time as secretary of defense, the commander of the U.S. Strategic Air Command (SAC) carried with him a secure telephone, no matter where he went, 24 hours a day, seven days a week, 365 days a year. The telephone of the commander, whose headquarters were in Omaha, Nebraska, was linked to the underground command post of the North American Defense Command, deep inside Cheyenne Mountain, in Colorado, and to the U.S. president, wherever he happened to be. The president always had at hand nuclear release codes in the so-called football, a briefcase carried for the president at all times by a U.S. military officer.

The SAC commander’s orders were to answer the telephone by no later than the end of the third ring. If it rang, and he was informed that a nuclear attack of enemy ballistic missiles appeared to be under way, he was allowed 2 to 3 minutes to decide whether the warning was valid (over the years, the United States has received many false warnings), and if so, how the United States should respond. He was then given approximately 10 minutes to determine what to recommend, to locate and advise the president, permit the president to discuss the situation with two or three close advisors (presumably the secretary of defense and the chairman of the Joint Chiefs of Staff), and to receive the president’s decision and pass it immediately, along with the codes, to the launch sites. The president essentially had two options: He could decide to ride out the attack and defer until later any decision to launch a retaliatory strike. Or, he could order an immediate retaliatory strike, from a menu of options, thereby launching U.S. weapons that were targeted on the opponent’s military-industrial assets. Our opponents in Moscow presumably had and have similar arrangements.

The whole situation seems so bizarre as to be beyond belief. On any given day, as we go about our business, the president is prepared to make a decision within 20 minutes that could launch one of the most devastating weapons in the world. To declare war requires an act of congress, but to launch a nuclear holocaust requires 20 minutes’ deliberation by the president and his advisors. But that is what we have lived with for 40 years. With very few changes, this system remains largely intact, including the “football,” the president’s constant companion.