Emilio San Pedro travels to Tijuana to profile a community under pressure from one of Mexico's most powerful drug cartels.
Nearly 1500 people have been killed so far this year in Mexico in violence related to the country's notorious cartels.
The government has sent thousands of troops into the worst-hit states in an effort to break up these criminal organisations and stem the flow of drugs into the United States.
Tijuana is home to the Arellano-Felix Organisation. How does the cartel shape the lives of Tijuana's inhabitants?
BBC Radio 4's Crossing Continents was broadcast on Thursday, 7 August, 2008 at 1102 BST. It was repeated on Monday, 11 August, 2008 at 2030 BST.
Reporter: Emilio San Pedro
Producer: Linda Pressly