When did Silverstein said this? Exactly this? On 9/11?
No!
He said this while being interviewed for the documentary. He was recalling the events and conversations of that aweful day. How the hell do we know Silverstein used those exact same words on that day?
First, it is important to know what question by the interviewer Silverstein was responding to.
Could this sort of question make sence?
Very good points indeed. Do we know what exactly he said on 9/11?