What was a newsworthy thing to come out of CNN's interminable climate town hall snoozarama last night? Surely not the details of the various candidates' plans to "save the planet." No, the most interesting thing was the way that Joe Biden's left eye filled with blood during his appearance. While it might not bear directly on his fitness for office, it certainly does play into the narrative questioning Biden's age, health history, etc. If you're a Biden campaign aide, surely you groaned when it happened. And you braced yourself for media coverage, particularly by CNN, which hosted the event. But...