CSi 23 – History,  is featuring programing commemorating the September 11, 2001 terrorist attacks on America.

On Sept 11, 2001, 19 militants associated with the Islamic extremist group al Qaeda hijacked four airplanes and carried out suicide attacks against targets in the United States. Two of the planes were flown into the twin towers of the World Trade Center in New York City, a third plane hit the Pentagon just outside Washington, D.C., and the fourth plane crashed in a field in Shanksville, Pennsylvania. Almost 3,000 people were killed during the 9/11 terrorist attacks, which triggered major U.S. initiatives to combat terrorism and defined the presidency of George W. Bush.

Commemorating the 20th anniversary of the September 11 attacks, The HISTORY® Channel will premiere three documentary specials, starting on September 10. Watch a preview for all three specials now.