METAIRIE, La. - A 17-year-old boy foiled an attempted carjacking, wrestling a gun from a would-be robber and shooting him after the man grabbed his mother, authorities said. Carl Chestnut, wounded in the head and torso, will face armed robbery charges once he is released from East Jefferson General Hospital, Col. John Fortunato, a Jefferson Parish Sheriff’s Office spokesman, said Monday. The 53-year-old woman, whose name wasn’t released, and her son were in the drive-through line at an Arby’s Roast Beef Restaurant early Monday when Chestnut, 44, walked up and pointed a gun at her, demanding their money and the...