really drew me to it. knowing that i can hold a piece of uranium in my hand that has enough, you know, energy locked in its nucleus to bring down an entire city, that's an incredibly powerful thing. to tell you the truth, the reason i started building my fusion reactor was to make things radioactive. i had this obsession with radioactivity, and short of contaminating something, to make something radioactive, you had to have a source of new tron ne neutrons. i didn't just have them laying around the house, but i would have to build a neutron reactor, and from that came the fusion. >> i'm donald phaneuf.