attack on the heart of this kru krunt. pat is on the groubd here the word trade center. >> he's having some audio problems, we'll. you have toj about the hijacked plaends and the terror to an hour before they realized something was wrong. then thinking they were going to the world trade center what . >> what is striking to me is we don't have any monitoring of the world trade center. this wasn't until after this happened -- >> the plane left for boston at