Then arrival team guy would have to be part of team Q because he would know who he sent it to, and therefore who Q is.
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Not really as I mentioned earlier. A member of the arrival could have sent info about the weather in Hanoi to the pilots of air force one
Those were then posted by Q it is just as possible that the person that took the picture does not even know Q posted it.
Fine, then the pilots know who team Q is. Someone for the DS to lean on. I just don't think that pix was taken by anyone outside the loop. That leaves room for a leak.