Ten years later, Americans who vowed never to forget Sept. 11, 2001, have kept their promise.
Ten years ago, the country came to a halt and American lives changed forever as terrorist-directed planes crashed into the World Trade Center Twin Towers in New York, the Pentagon in Arlington, Va., and a rural field near Shanksville, Pa.
Nearly 3,000 lives were lost that day, including 343 New York City Fire Department firefighters, 60 New York City and Port Authority officers, and eight emergency medical technicians and paramedics.