"R&R," "End Point," "CNN=Politics," "Political Pop," "Political Gut Check": An epidemic of branded news segments has taken over CNN. Which leads Jon Stewart to debut his own feature: "Why?" As in, why do CNN's cute segment names have little or no bearing on the content of the segments? Like, say, the bit about the wheelchair-bound bungee jumper on "Street Level." Or the story about a U.S. soldier going on a murderous rampage in Afghanistan, featured on … "Face Time." Or, to put it another way, "What the hell happened to CNN!?"