A look at key events in Mexico's war on drugs following the extradition of drug lord Joaquin "El Chapo" Guzman. — Aug. 23, 2010: The bodies of 72 migrants killed by the Zetas drug gang are found in San Fernando, Tamaulipas state. — Feb. 22, 2014: Drug lord Joaquin "El Chapo" Guzman of the Sinaloa cartel is arrested. — Sept. 26, 2014: In the city of Iguala, Guerrero state, 43 students disappear after corrupt police detain and turn them over to a drug gang. — Jan. 19, 2017: Joaquin "El Chapo" Guzman is extradited to the United States.

Source: ABC News January 19, 2017 23:29 UTC