Newly released Top Secret documents reveal that U.S. intelligence agencies had warnings about potential threats from Osama bin Laden in the years leading up to the September 11, 2001, terrorist attacks. The Central Intelligence Agency (CIA) has declassified over 100 pages of classified briefings provided to U.S. presidents, marking what the agency describes as its largest-ever disclosure of intelligence related to bin Laden and the events surrounding the 9/11 attacks. These documents, released on Friday, include 71 presidential briefs that date back as far as 1998 and provide insight into how U.S. officials were informed about bin Laden's plans and activities. Among the released materials is a document from 1998 during the Clinton administration that discusses a possible operation in which bin Laden might have planned to hijack a commercial airliner. The document notes that two of his accomplices may have bypassed security checks during a trial run. The heavily redacted documents also mention "potential U.S. targets" and reports from "questionable sources" suggesting that bin Laden was preparing to strike American soil. The documents highlight how CIA analysts tried to understand al-Qaeda's operations and intentions under bin Laden, despite limited or incomplete intelligence, and how they conveyed these concerns to White House officials. CIA Director John Ratcliffe stated that the declassification of these documents was an act of "exceptional transparency" meant to "honor the memory of those we lost on that tragic Tuesday." He also acknowledged the sacrifices made by generations of CIA officers in the fight against terrorism, noting that many have given their lives in the Global War on Terror. The documents include a memo from September 10, 1998, that stated bin Laden's "preferred option" was to strike the U.S. on its own soil in Washington, possibly by flying an explosive-laden airplane into a U.S. city. Another document from August 6, 2001, to then-President George W. Bush noted that bin Laden was "determined to strike" the U.S., possibly using al-Qaeda members living in the country. The FBI had also identified activity "consistent with preparations for hijackings or other types of attacks," including surveillance of federal buildings in New York. A document from August 28, 2001, just days before the attacks, described bin Laden's operations as "expert and flexible," though vulnerable to short-term delays or disruptions. It also noted that al-Qaeda emphasized "careful planning, tight security practices, and flexibility" in its operations, which the CIA described as "sound operational practices" that allowed the group to pose a threat to the U.S. even under heightened security. The release of these documents comes as the nation mourns the nearly 3,000 people killed in the 9/11 attacks, an event that has had a profound and lasting impact on the United States and the world.