Remembering 9/11: Twenty years later

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.

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.