On September 11, 2001, life in the United States changed forever. When terrorists crashed planes into the Twin Towers of the World Trade Center in New York City, the Pentagon in Washington, D.C., and a field in Pennsylvania, thousands of people died, leaving the country frozen in fear and grief. Young people today know 9/11 as a sad chapter in U.S. history, but what was that day like for the people who lived through it? They can find out in this collection of first-person stories, which are also available for them to watch online using the QR codes included in the volume.