Dude, give up.
Upon arrival at Logan, Atta and Alomari had to go through security a second time, which is usually unnecessary for connecting flights at most U.S. airports. Because of the way the Boston airport is configured, the hijackers arrived at Gate 9 in Terminal B but needed to cross a parking lot and were observed asking for directions to the gate where they boarded American Flight 11, according to the report.
http://www.washingto...84-2005Feb12.html
These were the ONLY two who didn't start at Logan and their last security check was at Logan. So Logan was the last security check for all of them. HTH FINALLY! ;0)