A 17-year-old St. Charles boy is charged with possession of an incendiary/explosive device and discharge of a firearm or dangerous weapon endangering public safety, Winona Daily News reports. The teen is accused of making a pipe bomb that was discovered in his mother's trunk last week while he was a patient at the hospital in Rochester. Authorities say the 3-foot-long device weighed about 50 pounds with gunpowder and fireworks.