Don't Miss: A Journey of 'Despair and Fear'

Most illegal immigrants to the United States come from Mexico, but Mexico has its share of illegal migrants as well. This morning on NPR, Lourdes Garcia-Navarro takes us to a pit stop on the edge of Mexico City, where she finds dozens of Central Americans making their way north illegally by rail.

One of them is a 27-year-old Honduran with four children. Maria del Carmen Brisol, making her first journey north, holds up a small plastic bag and describes a trip "full of despair and fear."

"This is all I have. I threw away my suitcase with all my clothes. The police were chasing us, and because we were running so fast we had to throw everything away. This pair of extra shoes is all I have left and the clothes on my back."

"They run from the police they say not because they are afraid of being deported," Garcia-Navarro reports. "They run because what little they have is taken from them by corrupt local and federal cops." There are also allegations by some migrants that Mexican police have raped female migrants making their way through the country.

One Honduran woman struggles with a crucial decision: continue northward or go back home?