“LAREDO, TEX. – Stashing cash in spare tires, engine transmissions and truckloads of baby diapers, couriers for Mexican drug cartels are moving tens of billions of dollars in profits south across the border each year, a river of dirty money that has overwhelmed U.S. and Mexican customs agents.

Officials said stemming the flow of this cash is essential if Mexico and the United States hope to disrupt powerful transnational criminal organizations that are using their wealth to corrupt, terrorize and kill.

Despite unprecedented efforts to thwart the traffickers, U.S. and Mexican authorities are seizing no more than 1 percent of the cash, according to an analysis by The Washington Post based on figures provided by the two governments.

The drug traffickers and their Colombian suppliers smuggle $20 billion to $25 billion in U.S. bank notes across the southwest border annually as they seek to circumvent banking regulations and the suspicions aroused by large cash deposits, studies by federal officials, regulators and academics show.”

http://www.borderlandbeat.com/2010/08/stepped-up-efforts-by-us-mexico-fail-to.html