Source: KTRK   SANTA FE, Texas (KTRK) — A 17-year-old carrying a shotgun and a revolver opened fire at a Houston-area high school Friday, killing 10 people, most of them students, authorities said. It was the nation’s deadliest such attack since the massacre in Florida that gave rise to a campaign by teens for … Continue reading SANTA FE HIGH SCHOOL SHOOTING 10 dead, 10 injured in shooting at Santa Fe High School