A group of migrants walk past plowed farmland after crossing into the United States from Mexico, as they make their way towards a gap in the border wall to surrender to US border patrol, near Penitas, Texas, U.S., January 10, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Asylum seeking migrants from Central America line-up along the border wall as they wait to surrender to the U.S. border patrol, after they crossed the Rio Grande river into the United States from Mexico, in Penitas, Texas, U.S., April 2, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A woman from Central America sits amongst a group of asylum seekers waiting to be transported to a nearby holding facility for migrants, where they can then make an application to claim asylum, after they crossed the Rio Grande river into the United States from Mexico, in Los Ebanos, Texas, U.S., May 7, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Migrants travel across the Rio Grande river into the United States from Mexico on a raft, in this aerial photograph taken with a drone near Penitas, Texas, U.S., March 21, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A group of migrants climb up the banks of the Rio Grande river after crossing into the United States from Mexico on a raft, in Los Ebanos, Texas, U.S., May 8, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A family from Guatemala seeking asylum, walk northbound through farmland after traveling across the Rio Grande river into the United States from Mexico, near Penitas, Texas, U.S., March 22, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Amy, 2, a migrant from Honduras seeking asylum, crawls on a muddy dirt road south of the border wall after she and a group of other migrants crossed the Rio Grande river into the United States from Mexico, in Penitas, Texas, U.S., April 1, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

A U.S. border patrol agent looks at cactus spines splintered into a man who was detained alongside a group of others who were suspected of smuggling marijuana into the United States from Mexico in Rio Grande City, Texas, U.S., April 11, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Juan, an 8-year-old unaccompanied minor from Guatemala who was travelling without any guardians, is registered by a border patrol agent in a field, after surrendering to border patrol with a group of other asylum seeking migrants who crossed into the United States from Mexico, in Los Ebanos, Texas, U.S., May 7, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Border patrol agents surround what they said was about 140 pounds of marijuana which was abandoned by smugglers in La Joya, Texas, U.S., November 7, 2019. The bundles of marijuana were estimated to be valued at $112,000. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Belongings left by migrants, lie along the bank of the Rio Grande river near Penitas, Texas, U.S., January 9, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Gabriella, 16, who is from Honduras, embraces her 10-month-old son David as she waits to be transported to a nearby holding facility for migrants, where they can then make an application to claim asylum, after they crossed through the Rio Grande river into the United States from Mexico on a raft, in Penitas, Texas, U.S., March 20, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A woman from Honduras, who crossed through the Rio Grande river into the United States from Mexico on a raft, dries her feet, in Penitas, Texas, U.S., March 20, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Asylum seeking migrants from Central America line up along the border wall, while they wait to be transported to a nearby holding facility for migrants, where they can then make an application to claim asylum, after they crossed through the Rio Grande river into the United States from Mexico on a raft, in Penitas, Texas, U.S., March 20, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Goldie, a patrol dog that belonged to the U.S. border patrol agent Javier Vega Jr, watches from the sidelines as the Sarita checkpoint is renamed "The Javier Vega Jr. Border Patrol Checkpoint" during a ceremony to honour Vega in Sarita, Texas, U.S., on March 20, 2019. Agents on the scene said that Vega, a father of three, was killed in Raymondville, Texas in August 2014, by two armed and undocumented immigrants during a robbery while he was on a family fishing trip . REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A U.S. border patrol agent approaches asylum seeking migrants as they walk along a trail, after travelling across the Rio Grande river into the United States from Mexico, in this aerial photograph taken with a drone near Penitas, Texas, U.S., March 21, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Asylum seeking migrants from Central America walk northbound towards the border wall after crossing the Rio Grande river into the United States from Mexico, in this aerial photograph taken with a drone near Penitas, Texas, U.S., March 21, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Turi Paz who is from Honduras, warms herself up with a thermal blanket as she waits with other asylum seekers to be transported to a holding facility for migrants, where they can then make an application to claim asylum, after they crossed the Rio Grande river into the United States from Mexico, in Penitas, Texas, U.S., April 1, 2019. Border patrol agents on the scene distributed the blankets as the weather became cold. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

The U.S. Customs and Border Protection (CBP) and Air and Marine Operations (AMO) patrol the Rio Grande river near Penitas, Texas, U.S., April 9, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A man directs his mobile phone towards a U.S. border patrol agent after traveling with a group of migrants across the Rio Grande river from Mexico into the United States, in Roma, Texas, U.S., April 11, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A U.S. border patrol agent holding a flashlight, helps a boy who is a migrant, climb up the banks of the Rio Grande river after a group of migrants crossed from Mexico into the United States, in Roma, Texas, U.S., April 11, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Transito Perez, who is from Guatemala, holds his two-year-old son Hesler Bladimir, as he is questioned by a U.S. border patrol agent after they crossed through the Rio Grande river into the United States from Mexico on a raft with a group of other migrants, in Roma, Texas, U.S., April 11, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A man who was apprehended alongside a group of others who were suspected of smuggling marijuana from Mexico into the United States, has flashlights pointed towards him by border patrol agents, as he climbs out of a tree surrounded by cacti in Rio Grande City, Texas, U.S., April 11, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A border patrol agent holds down a man who attempted to escape, after he was apprehended alongside a group of others suspected of smuggling marijuana from Mexico into the United States, in Rio Grande City, Texas, U.S., April 11, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Maria Jose Manuel holds her five-month-old son Jaden Jose, both of whom are from Guatemala, after they crossed through the Rio Grande river into the United States from Mexico on a raft, in Roma, Texas, U.S., May 1, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A border patrol agent stands in front of two men from El Salvador who were apprehended after crossing into the United States from Mexico, in Mission, Texas, U.S., May 7, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Jose Armando Amaya who is from Honduras, holds his 2-year-old son Jose Daniel as they wait with other asylum seekers to be transported to a nearby holding facility for migrants, where they can then make an application to claim asylum, after they crossed the Rio Grande river into the United States from Mexico, in a field in Los Ebanos, Texas, U.S., May 7, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A migrant from Central America, hides in a thick bush before being apprehended by border patrol agents after he crossed into the United States from Mexico with a group of men in La Joya, Texas, U.S., May 8, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A migrant from Central America, who border patrol agents suspected was a member of the gang Mara Salvatrucha (commonly known as MS-13), is handcuffed after being apprehended with a group of men who crossed into the United States from Mexico in La Joya, Texas, U.S., May 8, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A man on a raft with asylum seeking migrants from Central America, looks for a landing area along the Rio Grande river after crossing into the United States from Mexico, in Los Ebanos, Texas, U.S., May 8, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A man on a raft with asylum seeking migrants from Central America, paddles the boat towards the banks as he looks for a landing area along the Rio Grande river after crossing into the United States from Mexico, in Los Ebanos, Texas, U.S., May 8, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Ladi, a migrant from Honduras, climbs up the bank of the Rio Grande river while holding her 4-year-old nephew Dedier after they travelled across into the United States from Mexico on rafts, in Los Ebanos, Texas, U.S., May 8, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Border patrol agents apprehend migrants from Central America who were hiding in thick bush after they crossed into the United States from Mexico, in Mission, Texas, U.S., September 24, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A border patrol agent looks for smuggled migrants in a suspected stash house in McAllen, Texas, U.S., September 26, 2019. Law enforcement officials were called after people described seeing large groups of people being transported to and from the location. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Anna, 5, who is from Honduras, sits in the back of a border patrol vehicle after being apprehended along with a group of other migrants from Central America who were hiding in thick bush after they crossed into the United States from Mexico, in Mission, Texas, U.S., September 27, 2019. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Border patrol agents apprehend Karen Garcia and Valentina Vasquez Flores, both of whom are migrants from Honduras, after they were caught crossing the border from Mexico into the United States, in Roma, Texas, U.S., February 10, 2020. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Border patrol agent Garcia questions a man who he stopped on the road in Rio Grande City, Texas, U.S., February 10, 2020. The man was later free to go. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Border patrol agent Reyes and canine Boris search for narcotics inside a vehicle, in Rio Grande City, Texas, U.S., February 10, 2020. No narcotics were found and the driver was free to go. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

U.S. Customs and Border Protection (CBP) and Air and Marine Operations (AMO) patrol the Rio Grande river as employees of Fisher Sand & Gravel Company build a road next to a three-mile private border wall in Mission, Texas, U.S., February 11, 2020. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.