http://www.business2.com/articles/mag/0,1640,41206,00.html According to former and current DEA, military, and State Department officials, the cartel had assembled a database that contained both the office and residential telephone numbers of U.S. diplomats and agents based in Colombia, along with the entire call log for the phone company in Cali, which was leaked by employees of the utility. The mainframe was loaded with custom-written data-mining software. It cross-referenced the Cali phone exchange's traffic with the phone numbers of American personnel and Colombian intelligence and law enforcement officials. The computer was essentially conducting a perpetual internal mole-hunt of the cartel's organizational chart. "They could correlate phone numbers, personalities, locations -- any way you want to cut it," says the former director of a law enforcement agency. "Santacruz could see if any of his lieutenants were spilling the beans." The central feature of the facility was a $1.5 million IBM AS400 mainframe, the kind once used by banks, networked with half a dozen terminals and monitors.