He revolutionized the international drug trade, earned billions by smuggling cocaine to the United States and is said to be responsible for the deaths of thousands of people: Pablo Emilio Escobar Gaviria. On December 2, 1993, the powerful head of the Medellín cartel, was shot dead while fleeing from the police. Since then, much has changed in the Colombian underworld. “There are no longer any large, visible and powerful drug cartels that are commanded from above and whose leaders are known,” the retired director of the Colombian National Police, Óscar Naranjo, told dpa. The 66-year-old was in …