The gun was in a backpack, we're told. The backpack was dropped or set down in a Gardena High School classroom Tuesday morning, and the gun fired accidentally, critically injuring a 15-year-old female student who was struck in the head. A male student, also 15, was shot in the neck. You send your kids to school, and before the lunch bell rings, they're in the hospital. So the questions begin. Why is it so easy to smuggle a gun onto campus? How many more guns are on... (GunPolicy.org)