Trump 1.0: What the border looked like during the first Trump administration

A U.S. soldier keeps an eye on migrants from the U.S. side of the wall in Playas de Tijuana neighborhood in Tijuana, Mexico.

Young migrants from Honduras stand next to a train arriving at a train depot in Mexicali. The migrants had entered the U.S. seeking asylum and were returned to Mexico to await their court hearings in December. The migrants, not wanting to wait in the border city decided to head back to Honduras by jumping on a train

A Central American migrant runs alongside a south-bound train and prepares to jump aboard on July 15. Some migrants who were returned to Mexico under the Remain in Mexico policy are opting to return home.

Two migrants help Fernanda Ponce, 9, board a moving train heading out of Mexicali, as her parents run alongside. On the far left, a migrant holds Fernanda's 2-year-old sister.

A young asylum seeker from Zacatecas, Mexico wears an adult sweater as she tries to keep warm as she and hundreds of others camp at the base of the Paso del Norte International Bridge awaiting their turn to cross into the US.

A family naps in a homemade tent made of plastic tarps and blankets at the base of the Paso Del Norte international bridge.

Reporters try to talk to "Viper", a member of the United Constitutional Patriots - New Mexico Border Ops, after he was evicted from their camp Tuesday, April 23, in Anapra, N.M. Union Pacific police told them they would no longer be able to camp at their current site on Union Pacific property.

A vehicle belonging to a United Constitutional Patriots - New Mexico Border Ops is towed away from their campsite Tuesday, April 23, in Anapra, N.M. Union Pacific police told them they would no longer be able to camp at their current site on Union Pacific property.

U.S. Customs and Border Protection Tuesday, June 25, in Clint, Texas. There were about 255 children being held in what lawyers described as neglectful conditions during a visit Thursday to the Border Patrol station in Clint, Texas.

Evelin Ponce holds her 2-year old daughter, Evelin, while her other daughters, Fernanda, 9, right, and Anais, 6, stand nearby as they wait for a train to take them south out of Mexicali, Mexico. The Ponces, originally from El Salvador, sought asylum in the United States and were sent to Mexico to await an October hearing with an immigration judge. They didn't have money to stay in Mexico, so they decided to return to El Salvador.

Members of the fist wave of the migrant caravan visit Playas De Tijuana after arriving in Tijuana, Mexico on November 13, 2018. The group of 350 migrants traveled in 9 buses on the last part of the trip from Hermosillo, Sonora.

U.S. Customs and Border Protection officer keep an eye on Members of the fist wave of the migrant caravan as they visit Playas De Tijuana after arriving in Tijuana, Mexico on November 13, 2018. The group of 350 migrants traveled in 9 buses on the last part of the trip from Hermosillo, Sonora.

Apr 29, 2018; San Ysidro, CA, USA; Central Americans climb the U.S./Mexico border wall to greet immigrant rights activists at International Friendship Park as part of the "March Without Borders" rally in support of the migrant caravan which had arrived in Tijuana earlier in the week. The members of the caravan will try to seek asylum in the U.S. Mandatory Credit: Omar Ornelas/The Desert Sun via USA TODAY NETWORK

U.S. Border Patrol is seen at International Friendship Park as the "March Without Borders" rally takes place in support of the migrant caravan that arrived in Tijuana earlier in the week on April 29, 2018, in San Ysidro, CA. The members of the caravan will try to seek asylum in the U.S.

United States Border Control agents patrol along the Yuma Border Patrol Sector of the United States Border Patrol. At 5:30 p.m. on Thursday, the radio crackled in Border Patrol vehicles throughout southern Arizona. “We got a group walking east,” the voice said calmly. “Just south of the twelve.” Within seconds, two Border Patrol vehicles were speeding along the metallic-red section of a border wall that separates the city of San Luis, Ariz., and the city of the same name on the Mexican side. With the setting sun at their backs, a group of four women – a pregnant woman with her three-year-old child and a 41-year-old woman with her 13-year-old daughter – walked along the wall, looking for agents to turn themselves in. In 2018, citizens of 113 countries were apprehended along the southern border, according to Border Patrol data. More than 8,000 were apprehended from India, more than 1,000 from Bangladesh and Brazil, and more than 250 from Romania.

Arizona Border Recon volunteers Lorenzo Murillo (right) and Calvin Stowers watch the mountains near the U.S.-Mexico border for smugglers or drug traffickers.

About 2,000 of the Tohono O'odham Nation's 34,000 members live in Sonora, according to tribal officials.