If you enjoy these kinds of hypotheticals, check out the series For All Mankind on apple tv.
Even if it had happened, the response would also have been different.
As Gore came from the Clinton admin he and the people around him would have had a lot more experience dealing with and familiar with the threats and actors, who were already known.
- Gore was declared winner of the 2000 presidential election
- the WTC wasn't attacked on September 11th, 2001.
the two don't have to be connected to be wishes.
If the Supreme Court hadn't done the shenanigans in Florida, Clinton's team would've been Gore's team, and who knows, maybe those hijackers would've been caught...