Mexican cartels and vast US illegal drug market.

NEW YORK (AP) - The Mexican drug cartels battling viciously to expand and survive have a powerful financial incentive: Across the border to the north is a market for illegal drugs unsurpassed for its wealth, diversity and voraciousness. Homeless heroin addicts in big cities, "meth heads' in Midwest trailer parks, pop culture and sports stars, teens smoking marijuana with their Baby Boomer parents in Vermont—in all, 46 percent of Americans 12 and older have indulged in the often destructive national pastime of illicit drug use...Link