There are people in this thread who seem to be saying that because some urban myth was propagated about people celebrating in New Jersey when the WTC came down that a presidential candidate is under no greater responsibility to fact check those myths than the posters in this thread. There were some kids in New Jersey who committed vandalism and made asses of themselves because they got out of school early due to 9/11:
https://www.youtube.com/watch?v=QjzcWcas2Ss
That's it. If there were thousands and thousands of people celebrating the destruction of the WTC, don't you think there would be archival footage of it?