I recall those images too, but I also seem to recall them being from the Middle East. While I am sure there was celebration in parts of the U.S., Trump’s hyperbolic ‘thousands’ claim was a mistake that makes him look a bit silly. And I am a Trump supporter.
As I recall, there were Muslims celebrating in Washington - Seattle? maybe, and other places along with the east coast. Where on the east coast I don’t remember.
I do remember being furious that it was happening in the United States. Yes, I saw the Middle East ones too but that did not make me nearly as angry. My thinking was how could an American citizen celebrate the attack on America? Seemed like treason to me.