What happened on 9/11, 15 years ago today

It's the 15th anniversary of September 11, 2001, the date of the deadliest attacks on US soil since the Japanese bombed Pearl Harbor in World War II.

Nearly 3,000 people died in the 9/11 attacks, which The New York Times called the "worst and most audacious terror attack in American history."

The nation is still working to move past the tragedy.

These photos tell the story of what happened that morning, much of which was captured on live television.