Real life is real life.
This pretty much says it.
Nope, the whole world of the Fallout Universe got bombed. Some places were spared and some weren't lucky.
Again, no, plus in the Fallout universe the whole world was bombed and who knows what next will happen in our world than it is in Fallout.
No comment there...
All I can say is in the Fallout Universe is different from our reality from history and events from reality that never occurred in the game since Fallout games is just has alternate timeline compared to ours and a its theory of a what if this happened during the 1950s. Plus all the Fallout games are focused on the United States and we have no clue what else is happening on the other side of the world in Fallout unless there was some time of history going on the outside of America in Fallout games.
North America.