"We cannot defend America and our friends by hoping for the best. We cannot put our faith in the word of tyrants, who solemnly sign non-proliferation treaties, and then systemically break them. If we wait for threats to fully materialize, we will have waited too long — Our security will require transforming the military you will lead — a military that must be ready to strike at a moment's notice in any dark corner of the world. And our security will require all Americans to be forward-looking and resolute, to be ready for preemptive action when necessary to defend our liberty and to defend our lives."
President George W. Bush
“If the United States could have preempted 9/11, we would have, no question. Should we be able to prevent another, much more devastating attack, we will, no question. This nation will not live at the mercy of terrorists or terror regimes.”
Vice President Dick Cheney on the Bush doctrine