We&#x27;re doing that. Production of Pu238 (the RTG isotope) is being restarted.<p><a href="http:&#x2F;&#x2F;www.universetoday.com&#x2F;100875&#x2F;u-s-to-restart-plutonium-production-for-deep-space-exploration&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.universetoday.com&#x2F;100875&#x2F;u-s-to-restart-plutonium...</a>