He made the statement on Air Force One, suggesting the attacks could have been prevented if U.S. officials had heeded his warning.
Fact checks indicate Trump's book did not contain a specific warning about Bin Laden, only a brief mention of him as a 'shadowy figure' among security threats.
While the book did predict a major terror attack, it did not identify Bin Laden or al-Qaeda as the potential perpetrators.
By 2000, fears regarding Bin Laden and al-Qaeda were public knowledge, and US intelligence agencies were already monitoring him.