CHULA VISTA – A 7-year-old boy suffered serious head injuries today in a South Bay traffic collision that sent six others to the hospital, authorities said. The crash happened just before 3 p.m., on East H Street and Tierra Del Rey in Chula Vista, said police Lt. Dan Linney. Witnesses told police a Suzuki SUV headed west on East H. Street ran a red light and struck a Ford Explorer making a left turn onto eastbound H, Linney said. A vehicle on Tierra Del Rey was struck when the two SUVs spun out, the lieutenant said. The boy was airlifted...