Immigration has been a hot-button issue in the race for the White House.

And theres no denying that its a complicated subject.

The film opens with a long shot of the sunbaked desert at sunrise.

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Credit: Carlos Somonte

The landscape is a no-mans-land, harsh and unforgiving.

When it breaks down, the passengers are forced to continue their journey on foot.

Hes less interested in characters than in his cat-and-mouse setup.

After pulling the trigger, he growls, Welcome to the land of the free.

(I fear some people who see this will growl something similar.)

Those he misses become lunch meat for his bloodthirsty attack dog.

Who is this guy?

Is he just a redneck psycho after sick giggles?

Or is something else fueling him?

Cuaron isnt saying with this overly simplistic but effectively tense nail-biter.