Sibel Edmonds and 911

Sibel Edmonds case: The real culprits of 911

As we approach another 911 anniversary, it's time we learnt:
1) Who are these mid and high-level al-Qaida operatives?
2) What role did they play in planning 911?
3) What operational support did they provide?
4) Why they are still roaming free today?
5) Why did the US authorities continually exclude key participants from the official narrative?