What the fuck kind of country sits on it's ass and says "oh, of course nobody should see the code that counts our votes?!" That's EXACTLY the situation where you want to know that when you press "Candidate Niceguy" it doesn't log a vote for "Candidate Jackass". You should be able to view the source code INDIVIDUALLY on EVERY MACHINE, recompile before your vote, and get it replaced or use another method if it's dodgy!
I mean, what the fuck.
The link above is to the full hour and a half HBO documentary "Hacking Democracy" - thanks rumor_esq.