Mexican drug cartels move into Central America

A police officer guards the entrance of a house were a crystal meth lab was found in Tijuana, Mexico, Saturday, Feb. 12, 2011. According to the state police, nine suspects were arrested early Saturday during an operation to shut down a crystal meth lab and they claimed to work for the Mexican "La Familia" drug cartel. (AP Photo/Guillermo Arias)

March 14, 2011 5:31:03 AM PDT
On a steamy, late-summer day near the Salvadoran coast, more than 100 police working an intelligence tip scoured a near-vacant cattle ranch the size of 42 Manhattan blocks.