&gt; USSR had 40000 nuclear warheards. Sure there should had been a couple lost<p>Unable to find a fence.  Even I could fence gold and silver or copper.  Rare earths would have me scratching my head a bit, but I could probably figure it out.<p>Uranium or plutonium?  How would I even start?  I&#x27;d have to try to sell to North Korea, Iran, or Pakistan or who else?  How would I even come into contact with the appropriate people?