He said one day as we walked across the street, to the left the Capitol building all sparkly and shiny in the 9 am light, to the right the guardhouse which leads to the White House....

"One day I'm going to look up and there will be a huge mushroom cloud and it'll all be over."

my response:

"One day you'll look up and see a mushroom cloud and think, oh shit, and then it'll be all over."

We kept walking.