23 years ago on September 11, 2001 almost 3,000 people lost their lives during the attacks at the Twin Towers, Pentagon and aboard United Airlines Flight 93.

At 8:46 a.m. ET, American Airlines Flight 11 (traveling from Boston to Los Angeles) hit the north tower of the World Trade Center in New York City.

At 9:03 a.m. ET, United Airlines Flight 175 (traveling from Boston to Los Angeles) hit the south tower of the World Trade Center in New York City.

At 9:37 a.m. ET, American Airlines Flight 77 (traveling from Dulles, Virginia, to Los Angeles) hit the Pentagon Building in Washington.  

And at 10:03 a.m. ET, United Airlines Flight 93 (traveling from Newark, New Jersey, to San Francisco) crashed in a field near Shanksville, Pennsylvania.