[AnthonyMouse]

Obviously if you go down this road you end up in conspiracy theory land because everybody has their own version of historical events even after the parts that everyone admits happened, but here are a couple of incidents not on the list:

FBI had an inside man in the 1993 WTC bombing but chose not to thwart the bombing by substituting the explosives for inert powder (allegedly to preserve the inside man's cover): http://www.nytimes.com/1993/10/28/nyregion/tapes-depict-prop...

Second gulf of Tonkin incident famously used to justify the Vietnam war never actually happened. Government now admits it never happened, doesn't admit to intentional fabrication. (Is it a false flag operation to falsely claim there was an attack or provocation without properly verifying the truth of it before going public? Because if it is then we also get to put the Iraq WMDs on the list. For that matter, if we want to go that far back, the sinking of the USS Maine which was used to justify the Spanish-American war was also subsequently shown to not have been an actual attack: http://en.wikipedia.org/wiki/Maine_Incident#Investigations).

I don't mean to make the argument that the US is often in the business of bombing itself in order to drum up business for the defense industry, but rather that the defense industry will use anything that looks like an attack to opportunistically drum up business for itself. Only after they've finished lining their pockets with our money does it come out that the original justification evaporates upon scrutiny.