Story highlights Dramatic surveillance video shows gunman aim at customer, but gun doesn't fire

Video shows restaurant staff comforting injured victims

(CNN) It's a moment of horror almost too chilling to watch.

A woman takes refuge by the door of the restaurant.

Within seconds, a man (shown circled in red) holding what appears to be an AK-47 machine gun approaches the woman and pulls the trigger inches from her head.

But the gun does not fire.

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