^What are the sources of this information?
Al Qaeda does not exist:
C.I.A. no al-qaeda ever existed - BBC documentary "the power of nightmares" | Polidics.com
'Al Qaeda Itself Does Not Exist'Quote
If it doesn't exist and never has then it can not be a source of funds for organised terrorism or a terrorist organisation. However it is suspected that the CIA provides funds, arms and training to terrorists to serve its own agenda.Quote
So Marvin Bush was no longer (officially) on the board of the security firm in 2000. That does not mean he did not still maintain close ties with the company/other board members or ceased to have any influence over them. I think you will find the acting 'head' of a security firm will still bow to the wishes of its board.
QuoteFlight 77 Hijacker Hani Hanjour - 9/11 Pilot ExtraordinaireQuote
Hani Hanjour - Wikipedia, the free encyclopediaQuote
BBC NEWS | World | Middle East | Hijack 'suspects' alive and wellQuote
Many 9-11 "Hijackers" are Still Alive.Quote
MANY 9-11 "HIJACKERS" ARE STILL ALIVE.
The world's media has reported that many of the so-called hijackers "fingered" by the FBI are still alive. For example the BBC (British Broadcasting Corporation) carried this report:
Hijack "suspects" alive and well.