What did Clinton do to stop 9/11?
9/11 was planned and prepared for in America during the Clinton years.
Perhaps if he wasn't distracted by the affair he was having, he would have been on the ball with this one.
Perhaps if Democrat Jamie Goerlick didn't make it a crime for the FBI to talk to the CIA, we would have discovered this. Note: Goerlick later went on to be a big part in causing the 2008 housing collapse.