The CIA has released presidential intelligence briefs from the 9/11 era that warned of Al-Qaeda plotting to use aircraft in attacks on the United States.

CIA declassifies presidential briefings that trace al-Qaeda threats to hijack plans and target US cities before 9/11

A September 10, 1998 brief — parts of which have been redacted — says that Al-Qaeda “may fly an explosive-packed aeroplane into a US city”.