Hiroshima isn't real.

Hiroshima is a word attached to a place that exists thousands of miles away; and though it does occupy some tangible spot in the world, for so many of us it is only a mental construction.

Hiroshima isn't real.

We talk about Hiroshima.

We debate about what happened at Hiroshima.

We learn about Hiroshima in our schools.

We think we know.

But today I stood upon the exact spot where the first atomic bomb was detonated.

I can tell you, we don't know.