A giant American flag is unfurled from the construction at...

A giant American flag is unfurled from the construction at One World Trade Center tower during ceremonies marking the 11th anniversary of the 9/11 attacks in New York. (Sept. 11, 2012) Credit: Mike Segar/Pool

Whatever happened to the Flag - that iconic star of the photo taken not long after the Twin Towers fell, when several members of the  FDNY hoisted it atop a poll on still smoldering rubble? That's the subject of tonight's "The Flag" on CNN at 9 - the first film under the CNN Films banner, directed by Michael Tucker and Petra Epperlein (and produced by Tucker). The story, based on David Friend's book, is actually a mystery because the flag - in fact - disappeared. (And no, the picture above is not of  the flag in question.)  Two clips, and - again - tonight at 9: 

(App users, please watch the video at newsday.com/tvzone.)

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