Grief in California — mourning the Thousand Oaks massacre victims

The mourners gathered to hold hands, to sing and to wonder how one of the safest cities in America could become a killing zone.

Hundreds of people gathered Thursday evening to remember the dozen people shot and killed by a Marine veteran at the packed Borderline Bar & Grill the night before.

It was a scene of horror enacted in many places around the country in recent months, but never before in Thousand Oaks.

Terrified patrons who had gathered for the weekly line dancing and college night hurled barstools through windows to escape or threw their bodies protectively on top of friends as shots erupted. Twelve people were killed including Ventura County sheriff’s Sgt. Ron Helus, a 29-year veteran nearing retirement who responded to reports of shots fired and was gunned down as he entered the bar.

The killer, Ian David Long, 28, was a former machine gunner and Afghanistan war veteran who was interviewed by police at his home last spring after an episode of agitated behavior that authorities were told might be post-traumatic stress disorder. (AP)

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