On September 11, 2001, the world watched transfixed as hijacked planes crashed into the World Trade Center in New York City, the Pentagon in Washington, DC, and a field in Shanksville, Pennsylvania. <br /> <br />Around 3,000 people were killed on September 11, 2001. The catastrophe not only resulted in insanely expensive and largely unwinnable wars in Afghanistan and Iraq, but it also sparked a domestic war on terrorism, rewriting security and surveillance laws in the United States, the ramifications of which are still being felt today.