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The alleged leader of a faction of the hyper-violent Zetas cartel, Ivan Velazquez Caballero, known as "El Taliban," is shown during a media presentation at the Mexican Navy's Center for Advanced Naval Studies in Mexico City,Thursday, Sept. 27, 2012. Velazquez Caballero allegedly has been fighting a bloody internal battle with top Zetas' leader Miguel Angel Trevino Morales, and officials have said the split was behind a recent surge in massacres and shootouts, particularly in northern Mexico. (AP Photo/Eduardo Verdugo)

Associated Press
The alleged leader of a faction of the hyper-violent Zetas cartel, Ivan Velazquez Caballero, known as "El Taliban,"  is shown during a media presentation at the Mexican Navy's Center for Advanced Naval Studies in Mexico City,Thursday, Sept. 27, 2012. Velazquez Caballero allegedly has been fighting a bloody internal battle with top Zetas' leader Miguel Angel Trevino Morales, and officials have said the split was behind a recent surge in massacres and shootouts, particularly in northern Mexico. (AP Photo/Eduardo Verdugo)
The alleged leader of a faction of the hyper-violent Zetas cartel, Ivan Velazquez Caballero, known as "El Taliban," is shown during a media presentation at the Mexican Navy's Center for Advanced Naval Studies in Mexico City,Thursday, Sept. 27, 2012. Velazquez Caballero allegedly has been fighting a bloody internal battle with top Zetas' leader Miguel Angel Trevino Morales, and officials have said the split was behind a recent surge in massacres and shootouts, particularly in northern Mexico. (AP Photo/Eduardo Verdugo)
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