Doomsday New York: If Big Apple is hit with a nuke, here’s what happens

Is there a reason why New York City’s Emergency Management office might feel compelled to release a video warning what to do if the Big Apple is attacked with a nuclear device? One reason would be the fact that Russia is actively and specifically talking about nuking major Western cities like New York and London right now. Let’s look at what such an attack would do in this doomsday scenario.