Their trained mercenaries, their code of silence is unparalleled, their ruthlessness unquestioned, Los Zetas are one of the worlds most deadliest gangs and those that stand in their way pay a gruesome price. The gang already rules Mexico and now they have their eyes set on the US. The mighty Rio Grande separates the United States and Mexico, Laredo Texas sits on its banks. Across the water is the mexican city of Nuevo Laredo, the river is shallow and slow moving here, making it easy to cross illegally. Los Zetas have more capability that Al Qaeda does today to operate inside the United States.