From: daellis94@gmail.com   
      
   You're correct about the magnets, but none of the other elements there are   
   necessary for fusion-based drives.  They are not mysteries in the realm of   
   physics.  The only barrier is one of engineering.  In other words, one needs   
   materials more resistant to    
   high thermal and tensile stresses, fluids capable of managing extremely high   
   thermal flux to effectively cool the components of a fusion rocket, and   
   magnetic containment designs that are more efficient and more effective at   
   preventing leakage of high-   
   energy particles, as well as other things.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)