Lt. Col Brian Birdwell (L) who was injured at the Pentagon on September 11 and his wife Jan listen to U.S. President George W ...

As America nears the 25th anniversary of 9/11, a look at the numbers behind the deadliest terrorist attack in U.S. history.

The CIA have declassified documents showing US presidents were warned about Osama bin Laden and al-Qaeda before 9/11.

Pope Leo XIV, the first American pope, has called for a renewed commitment to peace as he marked the 25th anniversary of the ...

All four living former U.S. presidents are at Ground Zero today to mark the 25th anniversary of Sept. 11, 2001.

Did Saudi Arabia play a role in the planning and execution of the September 11 attacks of 2001? That question was raised ...

Relatives of victims said past administrations had not held the kingdom accountable, and called for action from President ...

The debates aren't settled. Where's the balance between liberty and security? Should 9/11-inspired video games be used to recruit soldiers in RL?

The CIA released 71 reports from the months and years leading up to 9/11, providing a new look at what the spy agency told ...

NBC Local stations across the U.S. have been reporting on how the Sept. 11 attacks transformed the country in the quarter ...

25 years after 9/11, the attacks’ devastating toll continues through lasting health effects, toxic exposure and annual ...