A 16-year-old high-school student armed with a shotgun opened fire Thursday at Taft Union High School in Taft, California, critically wounding one student and leading to the hospitalizations of two others.  The shooter, a boy who has not been named, was arrested after two school staff members convinced him to give up his weapon.  More from Reuters:

The shooting came less than a month after the mass shooting at Sandy Hook Elementary School in Newtown, Connecticut claimed the lives of 20 children and 6 adults.