Saving a few links to research... I wasn't aware of the extent to which 911 may not be the only instance of Zionist terrorism.

La Voz de Aztlan (Mexican-American news service), in it's excellent investigative report revealed:
"La Voz de Aztlan has learned that the Israeli Embassy used heavy handed measures to have the two Israelis released. Very high level emergency meetings took place between Mexican Secretary of Foreign Relations Jorge Gutman, General Macedo de la Concha and a top Ariel Sharon envoy who flew to Mexico City specially for that purpose. Elías Luf of the Israeli Embassy worked night and day and their official spokeswoman Hila Engelhart went into high gear after many hours of complete silence. What went on during those high level meetings no one knows, but many in Mexico are in disbelief at their release." (5)
In November of 2001, 6 more suspicious Israelis were detained in an unspecified mid-eastern state. They had in their possession box cutters, oil pipeline plans, and nuclear power plant plans. (6) The local police called in the Feds and Immigration officials took over the scene and released the men without calling the FBI. The Jerusalem Post, the Miami Herald, (7) and the Times of London (8) all carried this amazing story and all revealed how furious FBI officials were that these terror suspects with nuclear power plant plans were allowed to go free. Of course, the corruption riddled FBI would only have caved into Zionist pressure from the Justice Department's Criminal Division boss, Michael Chertoff, and also from the ADL's "partner", FBI boss Robert Mueller - who would no doubt have found a way to eventually release those Israeli terror suspects too.
In December, 2001, the Los Angeles Times published the story of how two jewish terrorists were arrested by the FBI for plotting to blow up the office of US Congressman of Arab descent - Darrell Issa (R-CA), and a California mosque. (9) Irv Rubin and Earl Kruger of the Jewish Defense League (JDL) were charged with conspiracy to destroy a building by means of explosives. This story got brief national coverage but quickly disappeared too.  What Really Happened

It might be worth tracking down the original articles.