“During the spring and summer of 2001, President Bush had on several occasions asked his briefers whether any of the threats pointed to the United States. Reflecting on these questions, the CIA decided to write a briefing article summarizing its understanding of this danger. Two CIA analysts involved in preparing this briefing article believed it represented an opportunity to communicate their view that the threat of a Bin Ladin attack in the United States remained both current and serious. The result was an article in the August 6 [2001] Presidential Daily Brief titled ‘Bin Ladin Determined to Strike in US.‘ It was the 36th PDB item briefed so far that year that related to Bin Ladin or al Qaeda, and the first devoted to the possibility of an attack in the United States.”
– 9/11 Commission, The 9/11 Commission Report, Page 260