Thank you - that's helpful. Does the ACT issue have to do with that flight directly, or is it also considered out of the airline's control if my specific flight was not impacted by ATC, but was delayed because that plane was subject to an ATC issue earlier in the day, under a different flight number, which put our flight behind? Also, is there any way to verify that it was indeed an ATC issue, and that the airline is not simply saying that to avoid claims? Looking at this particular flight on flightaware, it appears to be delayed much of the time, with an average delay of over an hour. That track record makes me suspicious of the explanation that we were given for the delay.