A gunman opened fire on a Jewish school in southern France Monday, killing four people -- the third shooting in the area in 10 days. The shooting in the city of Toulouse left a teacher and three children dead, including a 3-year-old, said local prosecutor Michel Valet. A fourth child was injured. The gunman arrived shortly after 8 a.m. and fled on a motor scooter after the shootings. He is believed to have used two different guns, interior ministry spokesman Pierre-Henry Brandet said. "It's a horrible tragedy," Brandet said on CNN affiliate BFM. It's the third shooting by a man...