So the pictures of Atta and the other hijackers that were shown in the media the very next day after 9/11 came from?????????????????????????????????
Drivers licenses? Passport photos? Visa Photos?
The passport agency in Saudi Arabia?
Pretty simple search. You have the passport numbers of those on board via the flight roster. You phone 'our good freinds' the Saudis and "send us the details for these passport numbers". Five minutes later by email you have everyones passport photo.