San Bernardino school shooting: Student killed had survived heart surgery

The 8-year-old boy shot and killed along with his teacher in a California special-education classroom was born with a genetic condition and had survived heart surgery, according to a school superintendent. Dale Marsden, superintendent of the San Bernardino City Unified School District, said at a news conference Jonathan Martinez had Williams syndrome, a rare disorder characterized by learning delays, mild-to-moderate intellectual disabilities and heart problems. -- More...