The Central Intelligence Agency (CIA) has declassified a series of presidential briefing documents, revealing that U.S. leaders were informed about Osama bin Laden and al-Qaeda in the years leading up to the 9/11 attacks. The documents, covering the period from February 1998 to September 12, 2001, show that the CIA tracked bin Laden's movements, finances, and domestic and international networks. One briefing warned that the organization "could crash an explosives-laden plane into a U.S. city," while other documents mentioned that some individuals in bin Laden's network had received hijacking training and sought materials to create radioactive "dirty bombs." This marks the largest declassification of presidential daily briefings by the CIA to date, but the documents do not provide new information about the attack plans. Instead, they reinforce the view that intelligence agencies possessed a large amount of fragmented information but failed to integrate it in a timely manner.