The "War on Drugs" Environmental Impact - John Davis

In the name of national security and the War on Drugs, the United States has erected large walls and fences as physical barriers to entry between itself and Mexico. But John Davis says that the only thing the fences do is disrupt natural migration routes for animals, rather than stop the flow of humans or illegal drugs between the countries. The conservationist and outdoorsman walked from Mexico to British Columbia in an attempt to understand the needs that wildlife have as they try to weave their way between protected areas and human-dominated landscapes.