Around the U.S., ceremonies commemorate the 25th anniversary of the Sept. 11th terror attacks in New York and at the Pentagon.

Several dozen presidential briefing documents declassified Friday, the 25th anniversary of the Sept. 11 attacks, detail intelligence government officials had gathered about Osama bin Laden and al-Qaida leading up to the hijackings that killed nearly 3,

The spy agency released dozens of intelligence documents it had sent to Presidents Bill Clinton and George W. Bush, outlining what was known about Al Qaeda.

Flags will fly at half-staff Friday as Americans mark 25 years since 9/11. Here's what's open, what's closed and how the day is observed.

25 years after the September 11 attacks, the New York Giants recall encountering the heroic passengers of Flight 93: "It really shakes you."

Solemn ceremonies at ground zero in New York, and across the United States, will mourn the thousands of lives lost. President Trump is scheduled to speak at the Pentagon.

A ceremony commemorating the 25th anniversary of the Sept. 11 attacks will take place in New York City starting at 8:30 a.m. Watch the livestream here.

The National September 11 Memorial and Museum commemoration at Ground Zero in New York this morning will center on the victims of the terrorist attacks on Sept. 11, 2001, as well as the World Trade Center bombing in 1993. During the ceremony, the names of all 2,983 fallen will all be read by family members of victims.