9/11 was unpreventable. It was coming. Either gore or bush, it would have came on its own. This problem has been on-going since 1970's or if not earlier.
Osama Bin laden have had been around since a long time. So it does not matter. Planning for a long time and well executed plan. It shook us up.
Clinton, Gore, Bush, who ever in power would only can impact within their term and on. Hard to clean up the past history.
In fact, I don't have sources for this. My understanding during Clinton's time... they successfully capture Osama Bin laden and had to ask Clinton permission what to do with him. Clinton decided to let him go. Can someone verify this information about Osama and Clinton administration.
Again... was it Clinton's fault that he let Osama go or its Bush's fault for not preventing 9/11? Both are involved with Osama Bin Laden.
I feel that 9/11 was an important factor in our life. It woke us up and begin taking actions again. Same with Pearl Harbor, it woke us up and we topple Germany and Japan within 4 years of declare war upon both. If Japan did not attack Pearl Harbor at the right time, USA will struggle invading Germany since United Kingdom were on thin defense. If Germany did not change their attempts to Russian, Germans will have successfully invaded UK completely. That is a key Island for us.
9/11 caused us to take action. Saddam Hussein took a fall for different reason. Now it woke up America and realized we have more enemy than we realized.
Sad that we are not following George Washington's infamous speech before he completed his presidency term. 4 points on his speech... check it out if you can find it.
Don't forget that the first attack on the WTC came on Clinton's watch.