What's the worst obstacle faced by the thousands of Central Americans attempting to cross - illegally - into the US each year?

Kidnapping by criminal gangs on the way?

Injury or death from the trains many jump off?

Or - patronising interviews by American journalists?

The last one is the subject of a Facebook satire video, starring migrants themselves and promoted by a campaign group that works with migrants to the US.

Video journalist: Greg Brosnan

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