You could tell that he was weighing his options and tuning out the kids, but his mind was racing. He knew he had good people in place working on this and was grouping his thoughts.
If Andy Card had said,"We have nukes flying in from Russia, what do we do?" and he just sat there you would have reason to complain but no one was asking for guidance at that split second.
Nothing could be done without all the information.
I believe he and his people acted accordingly to the threat.