President Obama, Joel McHale crack wise at White House Correspondents' Dinner
                                
                                
                                    (Newser) -
                                    The annual media spectacle in which the cadre of reporters assigned to 1600 Pennsylvania Ave. throws itself a glitzy party, mingles with Hollywood's bored and/or elite, and gazes deeply into its own navel is in the books. Highlights from the White House Correspondents' Dinner, aka "nerd prom,"...