This document summarizes and analyzes the impact of the September 11th, 2001 terrorist attacks on US foreign policy. It argues that ideology, specifically neoconservatism, dominated the principles and decision-making processes behind US military actions such as the 2003 invasion of Iraq. The document reviews US foreign policy decisions from 1997 to 2004 and explains how neoconservative ideology influenced decision makers, governments, public opinion, think tanks, and media to pursue an aggressive anti-terrorism stance focused on demonstrating American power.