Bill Clinton and George W. Bush received repeated CIA warnings that Usama bin Laden's network planned to hijack jets and attack U.S. cities.
https://www.foxnews.com/politics/clinton-bush-received-multiple-warnings-bin-laden-hijack-plots-before-9-11-declassified-files-show
https://www.foxnews.com/politics/clinton-bush-received-multiple-warnings-bin-laden-hijack-plots-before-9-11-declassified-files-show