Remembering 9/11: Aftermath of a National Tragedy | 24th Anniversary Mega Episode | Nat Geo

On the 24th anniversary of September 11, 2001, National Geographic presents a special mega episode that uncovers the global and personal stories of a day that changed the world forever. Survivors of the 9/11 attacks recount their harrowing stories of the day and describe how they’ve found ways to heal more than 20 years later. Newly declassified hard drives taken from the compound where Osama bin Laden was killed reveal a groundbreaking look at his personal life. Luis Rivera believed his wife Carmen survived the 9/11 attacks at the World Trade Center in New York. This is the story of his search for her.