A shitload of programs Clinton introduced to combat terrorism where either canceled or put on hold just after Busch took office.
There was even a report that stated bin laden wanted to hijack a plane and crash it into an American building, Busch ignored it.
Before 9/11 Busch had met with his cabinet members regaurding such a possibility maybe once, while Clinton was regurally holding weekly meetings.

For 2 1/2 years a US Commission on National Security/21st Century
was compliling reports on how to combat terrorism, and Busch decided that Cheney was going to investigate, and the entire report was ignored.