Carol Johns of Pascagoula says she doesn't need a state law to make her wear a seat belt. But, she acknowledges a law might have helped persuade her to buckle up years ago when she was a teenager learning to drive. "Whether we realize it or not, young people have a lot of respect for what the law says,'' said Johns, who's 55 and says she has only been wearing a seat belt regularly for three years. Mississippi could be on the verge of strengthening its seat belt law from a secondary offense to a primary one, meaning a law...