Fed sting in border town yields top prize
                                
                                
                                    (Newser) -
                                    Shots rang out for hours in a pitched gun battle between Mexico's military and a drug cartel, and when the dust cleared, a key drug kingpin, Antonio Ezequiel Cardenas Guillen, or "Tony the Storm," lay dead along with four cronies and three marines. Cardenas, 48, is one of...