December 4, 2008 4:34 pm Tough Times on Horizon for Truck Drivers A possible new rule requiring diesel exhaust filters could drive trucking companies off the road. US & World Videos 1:06 Interesting facts you never knew about The PGA Championship 1:45 NYPD enters Columbia University in riot gear to clear protest 6:17 Workers' comp claim denied after nurse's coworkers fail to give CPR 3:25 Little or no reaction from California officials on UCLA protest 3:40 UCLA promises more police, disciplinary action amid protest