If Trump's use of the word "thousands" is factually incorrect, it's only because MSM reports of that day implied that it was so.
In the Pablo Guzman report, he quotes unnamed FBI "investigators" as stating that an entire apartment building is a "hot address."
Guzman also states that the mosque of Sheik Abdul Rahmann is located between two apartment buildings, both of which were "getting attention" (Guzman's words) on 9-11.
I actually heard that report on 9-11 (or perhaps 9-12), even though I don't live in the NYC media market. I - like millions of others - was glued to the internet, and Free Republic all that day, and probably viewed it on-line.
I commend Trump for his memory, because I had forgotten this. The man obviously has a tremendous skill for classifying and recalling the most important facts in any situation, which is a skill one might expect in a billionaire.
And a good president.