TRENTON, N.J. - Which is more harmful to your health — a smoky bar or a city street filled with diesel truck fumes? Well, you might want to skip your next happy hour. Smoky bars and casinos have up to 50 times more cancer-causing particles in the air than highways and city streets clogged with diesel trucks at rush hour, according to a study that also shows indoor air pollution virtually disappears once smoking is banned. Conducted by the researcher who first showed secondhand smoke causes thousands of U.S. lung cancer deaths each year, the study found casino and bar...