Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front ...

A grenade is missing from the scene of a deadly explosion at a Los Angeles County Sheriff’s Department training facility, authorities have announced. Sheriff Robert Luna said the explosion killed ...

A grenade is missing from the scene of an explosion at a Los Angeles County Sheriff's Department training facility that killed three members of its arson and explosives unit, authorities said Friday.

A Los Angeles Sheriff’s Department cruiser at a crime scene. (Photo courtesy of the department) Sheriff’s officials were warning the public Saturday to be on the lookout for a possibly live grenade — ...

A grenade is missing from the scene of an explosion at a Los Angeles County Sheriff's Department training facility that killed three members of its arson and explosives unit, authorities said Friday.

Los Angeles County Sheriff Robert Luna announced Friday that one of two grenades found in a Santa Monica townhome complex prior to an explosion that killed three deputies is currently missing. The day ...