"If at any point in my life what I did mattered, it was now." Created in collaboration with National September 11 Memorial & Museum , the four-night limited series #911OneDayInAmerica continues TONIGHT at 9/8c. Catch up now on Hulu | National Geographic TV

3.5K views · 54 reactions | In remembrance of the attacks on September 11th in New York City, Washington D.C. and Pennsylvania 20 years ago this year, 9/11: One Day in America follows the events of that tragic day, minute by minute, as seen through the eyes of first responders and survivors who were there. 9/11: One Day in America premieres on Tuesday 31st August at 9pm on National Geographic UK. | National Geographic UK | Facebook

708K views · 10K reactions | Honoring the 20th anniversary, National Geographic presents a recreation of the events told by the survivors themselves. Catch 9/11: One Day in America, Saturdays at 10pm HKT/SIN, 9pm JKT/BKK on National Geographic. | National Geographic Asia | Facebook

291K views · 7.6K reactions | Starting 31st August at 9pm, 9/11: One Day in America marks 20 years since the tragic events of September 11th 2001. This groundbreaking documentary series tells the definitive story of the day through the experiences of those who were there. | National Geographic UK | Facebook

Starting 31st August at 9pm, 9/11: One Day in America marks 20 years since the tragic events of September 11th 2001. This groundbreaking documentary series tells the definitive story of the day through the experiences of those who were there. | National Geographic UK

41K views · 1K reactions | Told through powerful first-hand accounts, #911OneDayinAmerica honors the heroic actions of first responders and survivors. Created in collaboration with the National September 11 Memorial & Museum, the four-night limited series premieres tomorrow at 9/8c and next day on Hulu | National Geographic Documentary Films | Facebook