Here are twenty unanswered questions about 9/11, from William Bunch at the Philadelphia Daily News -- along with answers, or, more precisely, what (little) we know so far. Why did Attorney General John Ashcroft and some Pentagon officials cancel commercial-airline trips before Sept. 11? Why did the NORAD air defense network fail to intercept the four hijacked jets? Did any of the hijackers smuggle guns on board as reported in calls from both Flight 11 and Flight 93? I'm no conspiracy theorist, but I wouldn't mind getting some answers.

(Link courtesy of corrente.)