[Mitchell]

Here's the information as it's been published before:

5:33 a.m.: Atta and Alomari checked out of the Comfort Inn.
5:40 a.m.: The 2001 blue Nissan Altima rental car, bearing Massachusetts license 3335VI, entered Portland International Jetport Airport parking lot. It was parked on the first floor directly across from the airport entrance.
5:43 a.m.: Atta bought a one-way ticket from Portland, ME, to Los Angeles, with a stopover in Boston. Atta and Alomari checked in at US Airways counter.
5:44 or 5:45 a.m.: Atta and Alomari went through airport security, Portland, ME.
6:00 a.m.: Colgan Air plane took off for Boston. The two men sat behind one another on the plane.

[browardchad]

The timeline from which you posted quotes reports that Atta was in Florida on the morning of 9/8, in lower Manhattan on the evening of 9/8, at Boston's Logan Airport "scouting" for a major portion of the day of 9/9, rented a car in Boston on the evening of 9/9, stayed at a Boston motel on the night of 9/9, and passed through a Mass Turnpike tollbooth on the way to Maine on the afternoon of 9/10.

This story reports Atta rented the car on 9/10 (contrary to all other reports I've read). Assuming that the 9/9 car rental and stay in Boston can be documented with receipts, my guess is that someone else used Atta's credit card in New York, and it sounds as if the visit to WTC is simply a theory. (Or this entire story is hogwash).