08/01/2013 09:20 am ET Updated Oct 01, 2013

Miami Mercenaries: International Security Business Is Booming In South Florida

The cops lay motionless and silent on the sand -- two ink stains on an already bruise-black night. Through night-vision goggles, they surveilled the concrete skeleton of a building in the distance. Covered in graffiti, it rose like a crumbling tombstone against the desolate Mexican desert. Behind broken windows flitted the menacing outlines of men with assault rifles.

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