In international affairs, you never threaten things you're not prepared to do.

The possibility that Saddam Hussein will use his biological and chemical weapons to attack us, directly or in concert with terrorists, cannot be dismissed.

I believe that a nuclear Iraq can change its fundamental dynamic, affecting how others behave - toward us and toward allies such as Israel - and emboldening Saddam Hussein to believe, rightly or wrongly, that he can attack his neighbors and, because of his nuclear capability, we will hesitate.

He will use those weapons of mass destruction again, as he has ten times since 1983.

For the last eight years, American policy toward Iraq has been based on the direct threat Saddam poses to international security. That threat is clear. Saddam's history of aggression leaves little doubt that he would resume his drive for regional domination and his quest for weapons of mass destruction if he had the chance.

Rarely do schools acknowledge the power of peer culture in defining standards, and rarely do they take advantage of this power as an engine for quality. When students themselves are in charge of projects that they care about, peer pressure can become a powerful force for high standards.

In the 21st Century, the community of nations may see more and more of this very kind of threat that Iraq poses now - a rogue state with biological and chemical weapons. If we fail to respond, Saddam and all those who follow will believe that they can threaten the security of a vital region with impunity. But if we act now as one, we will send a clear message to would-be tyrants and terrorists that we will do what it takes to protect our security and our freedom in this new era.