I expect it to be because there isn't much plutonium left [1]. [1]: http://www.popsci.com/plutonium-238-is-produced-in-america-for-first-time-in-30-years http:

I expect it to be because there isn't much plutonium left [1]. [1]: http://www.popsci.com/plutonium-238-is-produced-in-america-for-first-time-in-30-years http://www.popsci.com/plutonium-238-is-produced-in-america-f...