Simple and well acted, it has tension enough to knot the stomach.

This is a must-see and one of the best documentaries - and films - of this year.

All that we are seeing on the screen is happening with real people, real action sequences in the background, forcing the eye to watch as if we were there.

True to its essence, the characters remain on the same line and manage to entertain the viewer, each highlighting their own distinctive qualities or touches.