Co-directed by Michael Tucker and Petra Epperlein, CNN Films' "The Flag" examines what happened to the flag raised on the site of the World Trade Center by three firemen, immortalized in one of the most iconic photographs of that day. The filmmakers unravel the mystery of the whereabouts of the flag and, along the way, trace its history and explore the meaning of this flag's image in the aftermath of that horrible event.
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Directors' statement
Watch Wednesday September 4 at 9 p.m. ET