The scenario that we’re going to be able to fight a war with another first world power, where we will attack their infrastructure but ours will be left untouched, seems unlikely.
In the mean time, the situation in EU and Asia is going to deteriorate and North America can absorb more talents as it sees fit. The last two times it was mostly EU but this time Asia might be the new talent pool we can draw from.
However, it's safe to assume cyber attacks will hit Arizona. It's not unreasonable to assume crazy people will attack critical infrastructure, and we'll have to deal with the social fallout from that.