U.S. Troops Increase Aid To Mexico In Drug War
The U.S. has been stepping up its assistance to Mexico's security forces in the fight against the drug cartels. The Mexican marines have been a leading beneficiary, and are now considered the most effective force.
Source: http://www.npr.org/2011/10/06/141128178/u-s-troops-increase-aid-to-mexico-in-drug-war?ft=1&f=1004