He's still free, and they still don't care.
I suspect their response to it was always about exploiting it to exalt their movement, not to prevent it happening again. That may be unfair, but other interpretations become less plausible by the day. They didn't cause it, and didn't expect it, but damned if they weren't going to use it.
They went to war with the wrong country in the name of it. They send soldiers to die in the wrong country with poor equipment in the name of it. They cowed their opposition in the name of it. They called their critics traitors in the name of it. They enriched the corporations they owned in the name of it. They still try to cow you in the name of it.
Today is September 11, 2008. Seven years ago Osama Bin Laden destroyed the World Trade Center, seriously damaged the Pentagon, and in all likelihood was planning to destroy either the White House or the Capitol building. He did it on the Republicans' watch.
He's still free. And they still don't care.