Guzmán oversaw operations whereby mass cocaine, methamphetamine, marijuana, and heroin were produced, smuggled into, and distributed throughout the United States and Europe, the world's largest users. He achieved this by pioneering the use of distribution cells and long-range tunnels near borders, which enabled him to export more drugs to the United States than any other trafficker in history. Guzmán's leadership of the cartel also brought immense wealth and power; "Forbes" ranked him as one of the most powerful people in the world between 2009 and 2013, while the Drug Enforcement Administration (DEA) estimated that he matched the influence and wealth of Pablo Escobar.