Today, the Cold War has disappeared but thousands of those weapons have not. In a strange turn of history, the threat of global nuclear war has gone down, but the risk of a nuclear attack has gone up. More nations have acquired these weapons. Testing has continued. Black market trade in nuclear secrets and nuclear materials abound. The technology to build a bomb has spread. Terrorists are determined to buy, build or steal one. Our efforts to contain these dangers are centered on a global non-proliferation regime, but as more people and nations break the rules, we could reach the point where the center cannot hold.
Now, understand, this matters to people everywhere. One nuclear weapon exploded in one city -— be it New York or Moscow, Islamabad or Mumbai, Tokyo or Tel Aviv, Paris or Prague —- could kill hundreds of thousands of people. And no matter where it happens, there is no end to what the consequences might be -— for our global safety, our security, our society, our economy, to our ultimate survival.
Some argue that the spread of these weapons cannot be stopped, cannot be checked -— that we are destined to live in a world where more nations and more people possess the ultimate tools of destruction. Such fatalism is a deadly adversary, for if we believe that the spread of nuclear weapons is inevitable, then in some way we are admitting to ourselves that the use of nuclear weapons is inevitable.
Just as we stood for freedom in the 20th century, we must stand together for the right of people everywhere to live free from fear in the 21st century. (Applause.) And as nuclear power —- as a nuclear power, as the only nuclear power to have used a nuclear weapon, the United States has a moral responsibility to act. We cannot succeed in this endeavor alone, but we can lead it, we can start it.
So today, I state clearly and with conviction America’s commitment to seek the peace and security of a world without nuclear weapons. (Applause.) I’m not naive. This goal will not be reached quickly —- perhaps not in my lifetime. It will take patience and persistence. But now we, too, must ignore the voices who tell us that the world cannot change. We have to insist, “Yes, we can.” (Applause.)
Now, let me describe to you the trajectory we need to be on. First, the United States will take concrete steps towards a world without nuclear weapons. To put an end to Cold War thinking, we will reduce the role of nuclear weapons in our national security strategy, and urge others to do the same. Make no mistake: As long as these weapons exist, the United States will maintain a safe, secure and effective arsenal to deter any adversary, and guarantee that defense to our allies —- including the Czech Republic. But we will begin the work of reducing our arsenal.