The conference isn't an observation of yours though, I'm not disputing your observations - that you dad told you a story and that you heard him being worried about some colleagues in NYC on 9/11.
But your story itself about the conference isn't a 1st hand account, you can't even find basic information about it and yet you're happy to share it/pass it on etc..
It isn't my dad telling me a story - I saw his reaction and borrowing all the phones he could to try and get in contact with people and knew what was going on at work. I didn't put as much importance in details as you are implying as I knew it happened and just found it odd - not trying to further a conspiracy.
The WTC7 stuff is unconnected to that.