Shock troops of capitalism, literally

Oil exploration often goes into areas that are, for one reason or another, off limits to a country’s government. Could be that the borders are contested, there are indigenous land claims, or the area is very environmentally sensitive. You hear about the oil companies being “shock troops” of capitalism, or modernity, or development. But in Colombia, the real live shock troops are now training to do oil exploration. Let Heather Walsh and Matthew Bristow tell the tale.