Hundreds of worried parents in San Mateo rushed to pick up their children Monday morning after an explosion rocked Hillsdale High School. Police arrested former Hillsdale student Alex Youshock after two of the bombs went off in an empty hallway at Hillsdale High. No one was hurt. Officers had to cut eight bombs off of the 17-year-old before they could take him into custody. They got him because three teachers threw themselves onto him and held him.
