Why do migrant caravans from Central America travel to Tijuana, taking the longest route to the U.S. border?

More than 6,000 Central American migrants overwhelmed the Mexican border city of Tijuana. But why did their caravan pick Tijuana in the first place?

     

 

 

Article Source: Why do migrant caravans from Central America travel to Tijuana, taking the longest route to the U.S. border?.