The DEA believes that they've found a major drug tunnel of the Sinaloa cartel in Arizona, which appears to be one of the most sophisticated, well-engineered tunnels. According to Doug Coleman of the DEA, it is believed that "professional engineers were cooperating with the builders, if not working on site." While a lot remains to be learned, they confiscated a 39-pound load of methamphetamine in the process of discovering it. [LATimes]