Tom Wainwright, author of "Narconomics," is the former Mexico City bureau chief for The Economist. He explains how the legal marijuana business in the United States is affecting drug cartels in Mexico.
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Tom Wainwright, author of "Narconomics," is the former Mexico City bureau chief for The Economist. He explains how the legal marijuana business in the United States is affecting drug cartels in Mexico.
Follow BI Video: On Twitter