Stock Photo: Los Angeles, California, August 18, 1965. A heavily-armed group of police and National Guardsmen stand ready at an open manhole after dropping a tear gas shell inside. Shooting suspects were believed to be using the storm sewer system to escape capture after a gun battle between the police and Black Muslims.

Stock Photo: 1035-12362 Los Angeles, California,  August 18, 1965.    A heavily-armed group of police and National Guardsmen stand ready at an open manhole after dropping a tear gas shell inside. Shooting suspects were believed to be using the storm sewer system to escape capture after a gun battle between the police and Black Muslims.