The purpose as I see the suicide/murder of 9-11-01 was to shut down the greatest country in the world. It almost worked, we virtually came to a screeching halt for a day and a half. This I think was there primary mission.
To that I say re-build the twin towers bigger and higher, just to let the terrorist , and the rest of the world know, they can hit us but they can NEVER, NEVER, beat us.(OOHRA)