"Regardless of what Einstein had come up with, it is very possible that a few hundred years into the future some scientist comes up with something that they have spotted in the universe that we have no idea exists today."

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We should also challenge this country to come up with strategies and technologies that allow us to produce nuclear energy without necessarily producing a byproduct that can be converted to something far more dangerous. I believe that can be done. It may not be done tomorrow, but it clearly needs to be worked on.

— Tom Vilsack