It happened on this day.in 2001 - Suicide hijackers crashed two airliners into the World Trade Center in New York, causing the twin towers to collapse. Another hijacked airliner hit the Pentagon and a fourth crashed in a field in Pennsylvania.
NEVER FORGET. Assistant Chief Gerard A. Barbara looks up at the burning towers of the World Trade Center on September 2001 in New York City. Moments later he would go in, never to return. (Photo by David Handschuh/NY Daily News Archive via Getty Images)
This picture shows the destruction cause by a terrorist attack in September 2001 of the twin towers, a unforgettable and very sad day for all of us as many innocent people lost their lives as well as many people lost their loved ones in the incident.
Never forget - Hijacked United Airlines Flight 175 from Boston crashes into the south tower of the World Trade Center and explodes at a. on September 2001 in New York City. (Photo by Spencer Platt/Getty Images)