“In October of 2008, Chicago-based drug trafficker Margarito “Twin” Flores was summoned to the Sinaloa Cartel’s mountaintop compound. The leaders of the Mexican narcotics syndicate were pissed. The brother of a top lieutenant had been arrested by the government and risked being extradited to the United States; the Sinaloans wanted to retaliate — in a massive and deadly way, and in the heart of Mexico City.”
Source: Cartel Plot: Use U.S. Guns for Massive Mexico City Attack | Danger Room | Wired.com