I was just beginning a series of conferences with the Prime Ministers and Foreign Ministers of Great Britain and of France.
The atomic age has moved forward at such a pace that every citizen of the world should have some comprehension, at least in comparative terms, of the extent of this development, of the utmost significance to everyone of us. Clearly, if the peoples of the world are to conduct an intelligent search for peace, they must be armed with the significant facts of today’s existence.
My recital of atomic danger and power is necessarily stated in United States terms, for these are the only incontrovertible facts that I know. I need hardly point out to this Assembly, however, that this subject is global, not merely national in character.
On July 16, 1945, the United States set off the world’s first atomic explosion.
Since that date in 1945, the United States of America has conducted forty-two test explosions. Atomic bombs today are more than twenty-five times as powerful as the weapons with which the atomic age dawned, while hydrogen weapons are in the ranges of millions of tons of TNT equivalent.
Today, the United States stockpile of atomic weapons, which, of course, increases daily, exceeds by many times the total equivalent of the total of all bombs and all shells that came from every plane and every gun in every theatre of war in all the years of World War II.
A single air group, whether afloat or land based, can now deliver to any reachable target a destructive cargo exceeding in power all the bombs that fell on Britain in all of World War II. In size and variety, the development of atomic weapons has been no less remarkable. The development has been such that atomic weapons have virtually achieved conventional status within our armed services.
In the United States, the Army, the Navy, the Air Force, and the Marine Corps are all capable of putting this weapon to military use. But the dread secret and the fearful engines of atomic might are not ours alone.
In the first place, the secret is possessed by our friends and allies, Great Britain and Canada, whose scientific genius made a tremendous contribution to our original discoveries and the designs of atomic bombs.
The secret is also known by the Soviet Union.
The Soviet union has informed us that, over recent years, it has devoted extensive resources to atomic weapons. During this period the Soviet union has exploded a series of atomic devices, including at least one involving thermo-nuclear reactions. If at one time the Unites States possessed what might have been called a monopoly of atomic power, that monopoly ceased to exist several years ago.
Therefore, although our earlier start has permitted us to accumulate what is today a great quantitative advantage, the atomic realities of today comprehend two facts of even greater significance.
First, the knowledge now possessed by several nations will eventually be shared by others, possibly all others.
Second, even a vast superiority in numbers of weapons, and a consequent capability of devastating retaliation, is no preventive, of itself, against the fearful material damage and toll of human lives that would be inflicted by surprise aggression. The free world, at least dimly aware of these facts, has naturally embarked on a large program of warning and defense systems. That program will be accelerated and expanded. But let no one think that the expenditure of vast sums for weapons and systems of defense can guarantee absolute safety for the cities and citizens of any nation. The awful arithmetic of the atomic bomb does not permit of any such easy solution. Even against the most powerful defense, an aggressor in possession of the effective minimum number of atomic bombs for a surprise attack could probably place a sufficient number of his bombs on the chosen targets to cause hideous damage.
Should such an atomic attack be launched against the United States, our reactions would be swift and resolute. But for me to say that the defense capabilities of the United States are such that they could inflict terrible losses upon an aggressor, for me to say that the retaliation capabilities of the Unites States are so great that such an aggressor’s land would be laid waste, all this, while fact, is not the true expression of the purpose and the hope of the United States.
