> Mr Tyson just said "... prosecuted anyone who dared have opposing opinions to their own." He is talking about the catholic church and galileo, but it seems fitting now.
I don't think the US government is hunting Snowden because he "dared have opposing opinions [to theirs]," but rather because he stole state secrets and released them to the public. (I'm not saying whether that's a good or a bad thing here, just that that's why he's not the US government's best friend at the moment.)