A crash early yesterday in Ralls county injured two teens. Missouri State troopers say 12-year old Madison Lamb and 14-year old Clayton Waelder were riding a Kawasaki dirt bike on a gravel road a mile south of Hannibal about 12:20 yesterday morning. Troopers say Waelder lost control of the bike and hit a mailbox, throwing both from the motorcycle. He was taken by car to Hannibal Regional Medical Center with minor injuries. Lamb suffered moderate injuries, but was also taken by car to Hannibal for treatment.