Fair point - if the decision to disperse had been made at a critical point in an escalating situation then weather conditions would have been irrelevant. What I meant was that if the decision to disperse had been made as part of the much-predicted gradual increase in tension (the theory being that dispersing the force sent a clear message) then there would have doubtless been sufficient time to take into account the conditions, availability of aircraft and dispersal bases, etc. But I quite agree that if the move had been taken in response to the possibility of an imminent attack, I don't suppose anyone would have been concerned about fog!