I read a science fiction short story a while ago and only remember fragments. It was a post apocalypse setting.
A group of people were forbidden to enter this area. High level of radiation. They see a sign saying "ashington". It turns out to be Washington DC after a nuke hit.
There's another part that says a man sits and stares out of a window. He turns out to be the president after the nuke strike.
Those are the only two things I can remember. Please help identify this story with title and author.