If Al Gore was elected, I feel safe in saying there wouldn't have even been a 9/11 at all.
How do I know? Because Cheney and Bush were focusing on missile defense, not terrorism. But Gore and the Democratic party already had Osama bin Laden in their sights. I know this excerpt from the 2000 Democratic Platform is long, but the difference is striking. Imagine how different our world would be today if Gore was elected and 9/11 never happened:
Battling Terrorism. Whether terrorism is sponsored by a foreign nation or inspired by a single fanatic individual, such as Osama Bin Laden, Forward Engagement requires trying to disrupt terrorist networks, even before they are ready to attack. We must improve coordination internationally and domestically to share intelligence and develop operational plans. We must continue the comprehensive approach that has resulted in the development of a national counterterrorism strategy involving all arms and levels of our government. We must continue to target terrorist finances, break up support cells, and disrupt training. And we must close avenues of cyber-attack by improving the security of the Internet and the computers upon which our digital economy exists.
As President, Al Gore will tolerate no attack against American interests at home or abroad: terrorists must know that if they attack America, we will never forget. We will scour the world to hunt them down and bring them to justice.
While fighting terrorism, we will protect the civil liberties of all Americans. Our justice system must guarantee fairness with procedures that protect the rights of the accused, even under the unusual circumstances of the investigation of threats to our national security. We must avoid stereotyping, for it defeats the highest purposes of our country if citizens feel automatically suspect by virtue of their ethnic origin. The purpose of terrorism is not only to intimidate, but also to divide and fracture, and we cannot permit that to happen.
For what it's worth, the 2000 Republican Platform never mentions bin Laden at all.