Border

A U.S. Border Patrol agent inspects a motorist's vehicle at a checkpoint 20 miles north of the United States and Mexican border near Tubac, Arizona.

A Border Patrol agent stands guard near the border wall at Sasabe, Arizona after a high speed auto chase in which multiple individuals were caught illegally crossing the border from Sasabe, Sonora, Mexico.

Footpaths, many created by undocumented immigrants crossing the Sonoran desert, are seen from the air near Sasabe, Arizona, 50 miles southwest of Tucson.

A U.S. Border Patrol agent tells first time crosser Paula Hernandez, 28, of Rancho Rio Medina, Oaxaca, what will happen to her and other detainees caught in the Sonoran Desert near Sasabe, Arizona. The group of 29 will be taken to a detention center in Nogales, Arizona where they will later be taken to the border and released back into Mexico.

Photographed through the border wall a group of men watch from a hillside in Sasabe, Sonora, Mexico as U.S. Border Patrol agents detain a group of undocumented immigrants that had been caught after agents stopped the speeding truck they were riding in at the border wall near Sasabe, Arizona.

These undocumented immigrants were caught during a high speed chase along the border wall in Sasabe, Arizona.

Undocumented immigrants, foreground, wait while Border Patrol agents complete their report after a high speed chase along the border wall near
Sasabe, Arizona.

A U.S. Border Patrol helicopter pilot watches over this group of undocumented immigrants caught in the Sonoran Desert near Sasabe, Arizona. They will be taken to a detention center in Nogales, Arizona where they will later be taken to the border and released back to Mexico. Agents rounded up 29 immigrants, from several states in Mexico, in the desert 50 miles southwest of Tucson.

U.S. Border Patrol agent Albert Fresquez talks with a member of the Sasabe, Sonora, Mexico Police force through the border wall after U.S. agents detained undocumented immigrants that had been caught after agents stopped the speeding truck they were riding in at the border wall near Sasabe, Arizona.

These undocumented immigrants, part of a larger group found in the Sonoran Desert near Sasabe, Arizona, are followed by U.S. Border Patrol agents in a helicopter as they walk toward a meeting point where they will be taken to the detention center in Nogales, Arizona. Agents rounded up 29 illegals in the desert 50 miles southwest of Tucson.

A U.S. Border Patrol searchlight stationed on a hillside in Nogales, Arizona illuminates Nogales, Sonora, Mexico. The Border Patrol uses the searchlights, along with video cameras and heat sensors to discourage undocumented immigrants from entering the United States.

A U.S. Border Patrol agent monitors activity along the border wall from her office in Nogales, Arizona.

A U.S. Customs and Border Protection agent holds his dog at attention before investigating this vehicle at the U.S. Port of Entry in Nogales, Arizona.

An undocumented immigrant stares out from a holding pen at the detention center in Nogales, Arizona.

U.S. Border Patrol agents watch as a woman removes her shoelaces after being detained and brought to this detention center in Nogales, Arizona.

Undocumented immigrants are led through this U.S. Border Patrol detention center in Nogales, Arizona.

A father and son rest after being detained in the desert and brought to this U.S. Border Patrol detention center in Nogales, Arizona.

A driver takes a break on his bus while waiting for passengers in Nogales, Sonora, Mexico. White crosses, representing those who have died crossing the border into the United States illegally are wired to the wall that separates the United States and Mexico.

A man stops at a food stand in Nogales, Sonora, Mexico, with the border wall, built by the U.S. Border Patrol and constructed of steel landing mat, separating the United States and Mexico.

The wall constructed on the United States and Mexican border, to help keep people from entering the U.S. illegally, is a backdrop for residents of Nogales, Sonora, Mexico relaxing in a friend's yard across the border from Nogales, Arizona. The owner of the property said that searchlights stationed on a hill behind the wall are so bright he must wear eye shades at night to sleep. The Border Patrol uses the searchlights, along with video cameras and heat sensors to discourage undocumented immigrants from entering the United States from Mexico.

A U.S. Border Patrol agent drives along the wall that separates Nogales, Arizona from Nogales, Sonora, Mexico on the U.S. and Mexican border.

A man waits to enter the United States from Nogales, Sonora, Mexico.

A man has his fingerprints electronically scanned by a U.S. Border Patrol agent while others wait their turn at the U.S. Border Patrol detention center in Nogales, Arizona.

Undocumented immigrants from the U.S. Border Patrol detention center walk to a waiting bus where they will be transported and returned to the Mexico at the border from Nogales, Arizona.

The border wall separating Nogales, Arizona from Nogales, Sonora, Mexico.

Children play on a trampoline at their home in Nogales, Arizona, separated from Nogales, Sonora, Mexico by a wall on the U.S. and Mexican border.