The Central Intelligence Agency has released 71 presidential intelligence briefs from 1998–2001 concerning the preparations for the September 11 attacks, infohub.kz reports.

The published materials reveal warnings about the threat posed by al-Qaeda and its plans to attack the United States years before the tragedy.

"Today, Director John Ratcliffe declassified 71 documents from the President's Daily Brief in commemoration of the 25th anniversary of the September 11 terrorist attacks and in accordance with President Donald Trump's historic transparency initiative," the CIA said.

The declassified documents, totaling more than 100 pages, represent the largest release of analytical materials on 9/11 since 2004.

The CIA emphasized that the briefs show how the agency's analysts sought to warn the country's leadership about the impending attacks amid scarce, incomplete, and fragmentary data.

According to RBC, on the morning of September 11, 2001, 19 suicide terrorists hijacked four passenger planes in the United States; two of them struck the towers of the World Trade Center. A third hit the Pentagon, and a fourth crashed near Shanksville, Pennsylvania. A total of 2,977 people died, and 24 remain missing.

Recall that it recently became known that the alleged mastermind of the September 11, 2001 attacks and three of his accomplices, held at Guantanamo Bay, will finally face trial in 2028.

We also reported that New York commemorated the victims of the September 11 attacks by recreating the outlines of the Twin Towers with 2,977 glowing drones.