One of the most infamous and maligned conspiracies involving the September 11th 2001 terrorist attacks has been the story of the Israeli moving company, Urban Moving Systems, and the three Israeli employees that were found celebrating the attack of the North Tower of the World Trade Center. When the East Rutherford Police Department later detailed these individuals, there seemed to be much more to their backgrounds than what was originally suspected. When the FBI field office in Newark. New Jersey became involved, it was led by Kevin Donovan (Special Agent in Charge) (SAC). Over the following 71 days until they were deported, the FBI and East Rutherford Police uncovered what seemed to be, a large illegal foreign intelligence operation, which are from Israel, which may have obtained specific data regarding the hijackers involved with the terrorist attacks. I read from, the FBI and East Rutherford redacted reports and fill in some of those blanks to the best of my knowledge using articles and archives of documents as well as media reports from the days after the events of September 11th 2001.
Dancing Israelis Police and FBI Reports 9/11/01:
https://archive.org/stream/DancingIsraelisFBIReport/fbi%20report%20section%202_djvu.txt
Urban Moving Systems Rewind (The Complete Version)