Walls won't work
"In the desert, smoke rises from the ground and you can die while you're walking," said Gutierrez, the migrant from Guadalajara. "The river here, even with a wall, is easier."
Jose Antonio Maldonado, a 16-year-old from Honduras who was trying to make it into the US illegally for the first time, said he had no family or friends there and was unsure where he would go to find work if he succeeds.
"We have withstood days of train rides, risking our lives without eating, without sleeping, to get to the border," he said.
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