The members of the Hamburg Cell were a boon to the 9/11 plot, which Khalid Shaikh Mohammed had proposed to Bin Laden in 1996. The Hamburg students were fluent in English, educated, accustomed to the Western lifestyle, radically Islamic, and capable of learning to pilot aircraft. "Bin Laden and Mohammed Atef wasted no time in assigning the Hamburg group to the most ambitious operation yet planned by al-Qaeda," the 9/11 Commission Report says.
http://en.wikipedia.org/wiki/Hamburg_cell(More is known about Mohammed Atta than any of the other 9/11 hijackers. However there are reports that seem to contradict others, indicating that he was in two places at the same time. Some reports may be unreliable, and it is possible that more than one person used Atta's identity at various times.)
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At 7:59, the plane departed from Boston, carrying 81 passengers. At 8:24, a voice believed to be Atta's said, "Nobody move. Everything will be OK. If you try to make any moves, you'll endanger yourself and the airplane. Just stay quiet." Atta is believed to have been the pilot of the plane when it crashed into the World Trade Center.
http://en.wikipedia.org/wiki/Mohamed_AttaAt the baggage check-in, the source says, Atta ran into another snag.
"The ticket agent said that when she went to do the security questions on him – you know, 'Have you left your bags unattended at any time' – he claimed he didn't understand because he didn't speak English," the American employee said. "So she called the supervisor to help.
"But of course, he couldn't interpret because we have no one who speaks Arabic on site – I mean, who does?" she continued. "So the supervisor said to send him down
, because it was getting close to departure."
http://www.worldnetdaily.com/news/article.asp?ARTICLE_ID=24596
The father of Mohammed Atta is still alive but nobody seems to want to hear from him.
The Voss family and the flight school people are still hanging around as are many many others who should be able to tell if the voice is the same one that they hear coming out of So&so's throat.
But this analysis will never ever be done.