Video of the tasering and death of Robert Dziekanski at Vancouver International Airport has been released.
The tape shows Dziekanski clearly agitated, pacing and sweating behind a glass security door.
He is shown trying to communicate with passengers on the other side.
Dziekanski picks up a computer keyboard and throws it to the floor; a short time later he also picks up a small table and throws that against a glass window.
Later four RCMP officers arrive and approach Dziekanski.
He is not showing any quick forward movements - he walks away from the officers and is then tasered once, falling to the ground. He is seen struggling and is heard moaning and yelling.
He is tasered a second time.
The four officers then hold him to the ground until he stops struggling.
Dziekanski's body lies motionless on the airport floor.