Look at their 'smoking gun' evidence here:
>He tracked down an email, what he considers a receipt, for services provided to the Russian government by a member of Unit 29155 for "potential capabilities of non-lethal acoustic weapons."
Acoustic crowd control weapons are not mysterious, there are people on YouTube building and testing them! American companies will sell them to any oppressive government around the world (I believe the ones used against Serbian protestors were American). Yet this description contradicts speculation about microwaves just a bit further down in the article.