How close our we to having Nuclear Fussion as a reliable fuel source?

Question: How close our we to having Nuclear Fussion as a reliable fuel source?
- Keywords:
  fuel,
  fussion,
  nuclear,
  reliable,
  source
Asked by kathanhal to Mark on 20 Mar 2011 in Categories: General.
- Mark Vesey answered on 20 Mar 2011:
  
  I don’t know too much about fusion but I think it will be quite a long time yet (>20 years) but research is continuing so we can be hopeful!

Question: How close our we to having Nuclear Fussion as a reliable fuel source?