they could have prevented 9/11

"the FBI would have raised 'alarm bells' and could have stopped the Sept. 11 attacks,"

AND THIS

there was even a suggestion that one might be flown into the World Trade Center, according to the NYT—and said that he raised the possibility to his superiors more than 70 times.

and finally THIS

"You thought a terrorist attack was coming, and you were being obstructed, right?" a defense attorney asked at one point.

"Yes, sir," Samit answered.

what more evidence do you NEED that they KNEW and did NOTHING about it.