From the New York Times review of Path to 9/11:
The Sept. 11 commission concluded that the sex scandal distracted the Clinton administration from the terrorist threat.
What the 9/11 Commission actually says (pg. 118):
Everyone involved in the decision had, of course, been aware of President Clinton’s problems. He told them to ignore them. Berger recalled the President saying to him “that they are going to get crap either way, so they should do the right thing.” All his aides testified to us that they based their advice solely on national security considerations. We have found no reason to question their statements.
This is what happens when people learn about the 9/11 Commission by watching Path to 9/11.