From the paramedics to the firefighters, the stories of first responders in #911OneDayinAmerica are harrowing, emotional, and heroic. From National Geographic in collaboration with National September 11 Memorial & Museum, the four-night limited series premieres on National Geographic TV Sunday, August 29 at 9/8c and next day on Hulu. | ABC13 Houston

192K views · 1.7K reactions | "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 | Facebook

9/11: One Day in America tells the in-depth story of September 11th through the eyes of the witnesses, heroes and survivors. Made in collaboration with the 9/11 Memorial & Museum to mark the 20th anniversary. 9/11: One Day in America is on National Geographic from 6 September to 11 September, every night at 7.30pm AEST. | National Geographic Australia