[Ken H]

Has it changed that much in 5 years? Walters said that for 2004-2005, pot was their "bread and butter". He made no mention of meth. From the Dallas News:

John P. Walters, director of the Office of National Drug Control Policy, said marijuana, not heroin or cocaine, is the "bread and butter," "the center of gravity" for Mexican drug cartels that every year smuggle tons of it through the porous U.S.-Mexico border. Of the $13.8 billion that Americans contributed to Mexican drug traffickers in 2004-05, about 62 percent, or $8.6 billion, comes from marijuana consumption.

http://www.dallasnews.com/sharedcontent/dws/dn/latestnews/stories/022208dnintdrugs.3a98bb0.html

[Army Air Corps]

It has changed a good deal in five years.