It has been 12 years since September 11, 2001, the date of the deadliest attacks on U.S. soil since the Japanese bombed Pearl Harbor in World War 2.
Nearly 3,000 people died in the 9/11 attacks, which The New York Times declared the "worst and most audacious terror attack in American history."
The nation is still working to move past the tragedy.
More than a decade later, New York City is still rebuilding the Financial District skyline. And earlier this year, a piece of one of the planes that crashed into the towers was found wedged between two buildings near Park Place downtown.
These photos tell the story of what happened that morning, much of which was captured on live television.
The morning of Sept. 11, 2001 started off like any other. The Twin Towers stood tall in the Financial District, as they had for more than 30 years.
At 8:46 a.m., American Flight 11 crashed into the North Tower of the World Trade Center. At first, newscasters weren't sure if it was an accident or a deliberate attack.
At 9:03 a.m., United Flight 175 crashed into the South Tower, leaving no doubt that this was an attack. Some news channels captured the traumatic moment on live television.
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