An artillery shell fired over Interstate 5 during a live-fire demonstration at Camp Pendleton prematurely exploded, military officials said in a report, calling the incident a "one in a million" ...

An artillery shell malfunction during a Marine Corps demonstration over Camp Pendleton showered shrapnel onto Interstate 5. The military investigation couldn't pinpoint the cause, though it ruled out ...

A Marine Corps investigation revealed that a malfunction during a live fire demonstration at Camp Pendleton led to shrapnel ...

Officials said the issue happened during a training exercise.