For example, the M388 &quot;Davy Crockett&quot;.<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=eiM-RzPHyGs" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=eiM-RzPHyGs</a> (test footage)<p>While that test was successful, as far as I know, the project was stopped before it was ever a &quot;production&quot; device. I suspect his was because of the risk to the operator, as small mortar and similar nuclear devices could jam or otherwise fail to move away form the launch site.<p>The whole concept of a nuclear mortar seems like an idea that sounds good on paper, but probably has all kinds of problem and subtle risks in implementation.