If anyone is crazy enough to want to kill a president of the United States, he can do it. All he must be prepared to do is give his life for the president's.

At the start of 2005 the idea of downloading a song to a mobile phone was an idea, by the end of the year it was a reality.

No treaty, however much it may be to the advantage of all, however tightly it may be worded, can provide absolute security against the risks of deception and evasion. But it can, if it is sufficiently effective in its enforcement and if it is sufficiently in the interests of its signers, offer far more security and far fewer risks than an unabated, uncontrolled, unpredictable arms race.

We must recognize that every nation determines its policies in terms of its own interests.

We go into space because whatever mankind must undertake, free men must fully share.

It should be clear by now that a nation can be no stronger abroad than she is at home. Only an America which practices what it preaches about equal rights and social justice will be respected by those whose choice affects our future. Only an America which has fully educated its citizens is fully capable of tackling the complex problems and perceiving the hidden dangers of the world in which we live. And only an America which is growing and prospering economically can sustain the worldwide defenses of freedom, while demonstrating to all concerned the opportunities of our system and society.

There is, in addition to a courage with which men die; a courage by which men must live.