Iran's continued pursuit of nuclear weapons, support for international terrorist organizations, and abhorrent human rights practices pose one of the greatest threats to global security.
Our failure to find weapons of mass destruction in Iraq thus far has been deeply troubling, and our intelligence-gathering process needs thorough and unbiased investigation.
Although every step must be taken to protect against a chemical or biological attack in America, our nation would survive the use of those weapons as we did when anthrax was mailed to our Capitol and other targets.
I visited the Chinese side last year. The Chinese are in a constant state of military readiness. They have all their nuclear weapons in the area, presumably trained on targets across the border.
In 1947 I defended my thesis on nuclear physics, and in 1948 I was included in a group of research scientists whose task was to develop nuclear weapons.
It seems to me we have been in a rhetorical arms race in this country, with each side unwilling to lay down its weapons for fear - usually justified - the other side would beat them to a pulp.
The fact is that America's weapons systems have made it impossible for anybody to confront it militarily. So, all you have is your wits and your cunning, and your ability to fight in the way the Iraqis are fighting.
I have to bring to your notice a terrifying reality: with the development of nuclear weapons Man has acquired, for the first time in history, the technical means to destroy the whole of civilization in a single act.
If the militarily most powerful - and least threatened - states need nuclear weapons for their security, how can one deny such security to countries that are truly insecure? The present nuclear policy is a recipe for proliferation. It is a policy for disaster.
Indeed, the whole human species is endangered, by nuclear weapons or by other means of wholesale destruction which further advances in science are likely to produce.