National Geographic Sets '9/11: One Day in America' Documentary Series

National Geographic will mark the 20th anniversary of the Sept. 11 attacks on New York City and Washington D.C. with a six-part documentary special debuting in August.

The series, 9/11: One Day In America, debuts Aug. 29 will chronicle the events of that day through first-person narratives of the first responders and survivors who were there, said the network. 

Nat Geo will air 9/11: One Day In America over four consecutive nights with limited commercial interruption, said the network. Episodes will be made available the next day on Hulu.

The series is produced by 72 Films and executive produced by Dan Lindsay and T.J. Martin (LA 92, Undefeated).

“We all remember exactly where we were on Sept. 11, 2001. Amidst the tragedy, chaos and sadness, what we also remember are the incredible feats of heroism, selflessness and humanity on display that day,” said Courteney Monroe, president, National Geographic Content in a statement.. “With this series, we aim to immortalize these stories and continue National Geographic’s legacy of authentic, powerful storytelling that provides deeper meaning around important historical events.”

The six-part series spans seven hours, with the first episode of the series -- which premiered June 11 at the Tribeca Film Festival -- running approximately two hours.

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R. Thomas Umstead serves as senior content producer, programming for Multichannel News, Broadcasting + Cable and Next TV. During his more than 30-year career as a print and online journalist, Umstead has written articles on a variety of subjects ranging from TV technology, marketing and sports production to content distribution and development. He has provided expert commentary on television issues and trends for such TV, print, radio and streaming outlets as Fox News, CNBC, the Today show, USA Today, The New York Times and National Public Radio. Umstead has also filmed, produced and edited more than 100 original video interviews, profiles and news reports featuring key cable television executives as well as entertainers and celebrity personalities.