A herd of African elephants instinctively formed an "alert circle" to protect the younger elephants at the San Diego Zoo Safari Park as a 5.2-magnitude earthquake shook Southern California on Monday. Khalaf Barksdale was one of the victims of the deadly shooting spree that began at the store.

A Walmart employee killed one co-worker and injured another in an after-hours shooting spree that started at the store and ended with the individual killing another co-worker at a nearby home, according to law enforcement officials.