Coincidences:
Silicon says:
Larry Silverstein and family, who apparently worked in the WTC buildings, did not go to work that day, despite being regulars at the WTC previously, with Larry Silverstein even having breakfast in the cafe high up one of the WTC towers.
BHS, says:
Coincidence that the same security company that handled the WTC complex, also handled united and Dulles? That security company had a Bush as chair until a few months before the attack, that same Bush moved to the insurance company as a chair that Silverstein used for the terrorist insurance....Insurance he just so happened to take out 6 weeks before?
I don't think enough evidence is presented to say the absence of those people on that particular day is a coincidence. How common was it for them not to be there at that time of day? If they were there virtually every day at that time, but not that day, that is a strong coincidence. If it was pretty hit and miss that they would be there, then not so much.
The security company. Again, not enough information. Who else do they handle? If they handle a large number of important buildings and complexes, it's not really a coincidence. As for the insurance. When did he buy the building and what sort of insurances were required by investors? If you buy a house the mortgage company is going to require some insurance on the property.
Maybe these things are coincidences but not enough information is provided to prove that. And virtually no supporting evidence.
I have seen it posted that it is too much of a coincidence that the planes could be hijacked at all from trained pilots. But this is post 911 thinking. We would need to know what sort of training was involved before we can make that statement. Remember, previous to this if a plane was hijacked in the US, I believe, most people got out alive. They wanted money or to be taken somewhere. No one would have been thinking they would use the planes as weapons.
In general, we have not been given enough information to classify any of these as coincidences, imho.