"Blindspot: The Road to 9/11" Chronicles Events Leading Up to 9/11 Attacks
In this Sept. 13, 2001 file photo, an American flag flies over the rubble of the collapsed World Trade Center buildings in New York.
( AP Photo/Beth A. Keiser, File )
( AP Photo/Beth A. Keiser, File )
Produced by Meg Dalton
Hosted by Dr. Melissa Harris-Perry
