It was reported that the Mossad informed the Federal Bureau of Investigation (FBI) and Central Intelligence Agency (CIA) in August 2001 that as many as 200 terrorists were slipping into the United States and planning "a major assault on the United States." The Israeli intelligence agency allegedly cautioned the FBI that it had picked up indications of a "large-scale target" in the United States and that Americans would be "very vulnerable".[71][72][73]

In September 2001, The New York Times and Israeli newspaper Haaretz reported that four hours after the attack, the FBI arrested five Israelis who had been filming the smoking skyline from the roof of a white van in the parking lot of an apartment building, for "puzzling behavior". They were charged with illegally residing in the United States and working there without permits. The Israelis were said to have pulled into the parking lot after the destruction of the first tower and videotaped the remainder of the disaster with what was interpreted as cries of "joy and mockery".[74][75][76] The incident became known as the "dancing Israelis" in conspiracy theory circles.[77] Police found the van and a search revealed $4,700 in cash hidden, along with foreign passports and a boxcutter which aroused suspicions and led to the detention of the occupants. The men were held in detention for more than 2 months, during which time they were subjected to interrogation and polygraph tests, before being deported back to Israel.[78] Back home, several of the men appeared on an Israeli TV chat show, where one of them, Oded Ellner, subsequently stated that “The fact of the matter is we are coming from a country that experiences terror daily. Our purpose was to document the event”.[79][80]

The five men worked at the company Urban Moving Systems Inc, owned and operated by Dominik Suter. After the men were arrested, the FBI searched their offices and questioned Suter; however, Suter fled to Israel before he could be questioned further. Eventually, Suter's name appeared on the May 2002 FBI Suspect List, along with the Sep 11 hijackers and other suspected extremists.[81]

On March 15, 2002, The Forward claimed that the FBI had concluded that the van's driver, Paul Kurzberg, and his brother Sivan, were indeed Mossad operatives, who were in America "spying on local Arabs".[82] ABC News cited this report on June 21, 2002, adding that the FBI had found no evidence that the five Israelis had foreknowledge of the attacks.[83]

In March 2001, the US Office of the National Counterintelligence Executive had issued a warning about people identifying themselves as "Israeli art students" attempting to bypass security and gain entry to federal buildings, and even to the private residences of senior federal officials. A French intelligence agency later noted "according to the FBI, Arab terrorists and suspected terror cells lived in Phoenix, Arizona, as well as in Miami and Hollywood, Florida, from December 2000 to April 2001 in direct proximity to the Israeli spy cells". The report contended that Mossad agents were spying on Mohammed Atta and Marwan al-Shehi, two leaders of the 9/11 hijack teams.[84][85][86][87][88] In 2002 several officials dismissed reports of a spy ring and said the allegations were made by a Drug Enforcement Administration agent who was angry that his theories had been dismissed.[89]

Iranian President Mahmoud Ahmadinejad said in an August 2010 speech that no "Zionists" were killed in the attacks since, according to him, "one day earlier they were told not go to their workplace." He also remarked, "What was the story of September 11? During five to six days, and with the aid of the media, they created and prepared public opinion so that everyone considered an attack on Afghanistan and Iraq".[90] However, contrary to such conspiracy theories about Jews being warned not to go to work that day, the number of Jews who died in the attacks is variously estimated at between 270 and 400,[91][92][93] while several Israelis died in the attack as well.[94]

(http://www.autoadmit.com/thread.php?thread_id=5835404&forum_id=2Elisa#49673943)

On September 6, 2001, a freshman from a class of Pakistani immigrants at New Utrecht High School in Bensonhurst, Brooklyn, was overheard by his English teacher, Antoinette DiLorenzo, to say that the two World Trade Center towers "won't be standing there next week." After DiLorenzo reported the incident on September 13, the youth and his older brother were questioned by the FBI and local police. According to police, the youth admitted to making the comment but he and his brother said he had been kidding.[111]

Kurt Sonnenfeld, a former videographer for the Federal Emergency Management Agency (FEMA) who documented the aftermath of the attacks at the World Trade Center complex, claims that he has videotapes proving that U.S. government officials had prior knowledge of the 9/11 attacks. Sonnenfeld is currently living in Argentina, where Denver police are seeking his extradition on charges of murdering his wife.[112]

(http://www.autoadmit.com/thread.php?thread_id=5835404&forum_id=2Elisa#49673951)