KJZZ's Fronteras reporting team joined migrants as they traveled thousands of miles to reach the U.S. This multi-part series put reporters on the ground in four countries to document the challenges migrants face on their trek through Central America, Mexico and the U.S. In San Luis Rio Colorado, Mexico, the asylum wait list has over 1,100 people. Other border cities have as many, or many more. → Special Report: 'Tracing The Migrant Journey'