Founder of al Qaeda, the terrorist network responsible for the attacks of September 11, 2001, and other attacks.

A war fought to end Saddam Hussein's influence in Iraq. U.S. claimed he had connections to terrorism and had WMD.

Biological, chemical, or nuclear weapons that can cause a massive number of deaths in a single use.

Was dictator in Iraq who refused to let the UN into Iraq in order to check if the country was secretly holding weapons of mass destruction.

Policy adopted by the Bush administration in 2001; asserts America's right to [preemptively] attack any nation that has weapons of mass destruction that might be used against U.S. interests.

Law responding to 9/11. Expands anti-terrorist powers (wiretapping, surveillance); Raises 4th Amendment concern for civil liberties.