Bush Knew?

Okay, so I am no fan of George W. Bush. For various reasons. And I strongly suspect some members of his administration had a hand in facilitating the 9/11 attacks. But did Bush "know" about 9/11? My guess is that he really didn't know any specifics, but knew something was going to happen. He had to have, of course, "plausible deniability". Did Bush in any way "approve" an order or direct someone to allow 9/11? Who the heck knows? But what I can say, is seeing what this administration is like, how craven and self-serving they are, I wouldn't put some direct involvement in 9/11 past them.