24h of Violence in Mexico: mass grave in Tijuana Mexico is an enormous mass grave. It is estimated that there are 50,000 disappeared in the country and since the war on drugs began in 2006, more than 3,000 clandestine graves have been found. Some, like this one in Tijuana, have become places of memory. AFP journalists spend 24 hours capturing scenes of violence in the Latin American country. IMAGES AND SOUNDBITES