On the heels of NBC News hiring private guards to protect their reporters in looter-plagued New Orleans, gunfire forced an ABC News crew to abort its attempt to film at a hospital on Thursday. (For the love of god, where's Mad Max when you need him?) Meanwhile Dateline NBC's Wednesday-night special on the tragedy triumphed in the Nielsens, averaging 11.7 million adults in the 18-to-49 demo  the largest audience of the night.