What do they put in the water cooler at NPR? First, they fire Juan Williams in October for comments he made on Fox News Channel — and Vivian Schiller, the CEO of public radio, smilingly suggests he needs to have his head examined. This week, a sting video shows NPR Foundation president Ron Schiller (no relation) saying that Tea Party activists were “seriously racist” and telling two purported Muslim program underwriters that there aren’t enough “non-Zionist&rdquo...