Teens who text while driving are more prone to take other driving-related risks, like riding with a drunk driver.  That's a key finding in a new Centers for Disease Control and Prevention study.  It also indicates close to half of American high school students had texted while driving in the past month, which is against the law in almost every state nationwide.  

One researcher urges parents who may be worried about their child's driving habits to seek help from their teen's doctor or a school counselor.