A family self-surrenders to the United States Border Patrol agency at Eagle Pass in Tijuana, Mexico.

Migrant “runners” wait handcuffed after trying to evade Border Patrol in La Joya, Texas.

A young unaccompanied minor looks up defiantly at Border Patrol after arriving on American soil in La Joya, Texas.

Children run by the break in the the border wall at Eagle’s Pass in Tijuana, Mexico.

Newly arrived migrants wait in the grass in La Joya, Texas to be processed and transported by U.S. Border Patrol.

Migrants trying to run from U.S. authorities are caught and corralled up to a waiting Border Patrol agent.

Migrant families wait to be processed and transported after arriving in La Joya, Texas.

A mother and her child sit waiting to be transported in a Border Patrol vehicle in La Joya, Texas.

A mother carries her young child across the Rio Grande River in Roma, Texas.

A raft of America-bound migrants wade in the darkness on the Rio Grande River.

A raft carrying families seeking asylum in the United States arrives in Roma, Texas.

Migrants create a human chain to help one another cross the cold waters of the Rio Grande River in Del Rio, Texas.

The imprinted footsteps of those who crossed.