There is an emergency alert. By and large, it's for natural disasters. In the world of ballistic missiles, the timelines are so short. For example, from Russia to North America is about a 30-minute flight, so what are you going to do? We don't have a civil defence capability. There are places you might want to go as deep as you can underground, in the basements of places, but otherwise it can cause more danger, which is ironic in a way, particularly if you're wrong, than it can help, because there will be great panic with nothing to do.
On February 8th, 2018. See this statement in context.