From the archives: In 2021, CBS News’ Norah O’Donnell sat down with Air National Guard pilots Lt. Gen. Marc Sasseville and Heather Penney as they recounted the harrowing events from Sept. 11, 2001, when they heroically rushed into their F-16 fighter jets in what they knew might be their last mission to protect the nation's capital after the World Trade Center attacks in New York City.

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