"I have become death..."

Was out shopping today. As i was waiting for my jeans to be sown up i went to a bookstore and flipped through some photography books. Came across a piece about atomic bomb tests in Nevada, US. If my horrible memory serves me right, the picture was of the first bomb test after which the creator had said, and this really moved me when i read it:

"I have become death, the destroyer of worlds".

I believe it was a qoute from a text on Indian mythology or Hinduism (or something of the kind).