See: http://techcrunch.com/2014/08/14/y-combinator-and-mithril-invest-in-helion-a-nuclear-fusion-startup/
Some points to mention: - Three years for them to get things going is considered a long time (cf. BLP). - They do not appear to be using d+t, and instead are using just deuterium (if I've understood this detail). - They're aiming to build a rather small device that will compete with things like diesel generators. (I'm guessing they won't achieve break-even in three years' time.) Eric

