A U.S. Customs and Border Protection (CBP) official stands during a routine checkpoint at the Brownsville-Matamoros International Bridge on the U.S.-Mexico border, seen from Matamoros, Tamaulipas, Mexico June 28, 2019. REUTERS/Carlos Jasso

REFILE - REMOVING EXTRA WORD U.S. Customs and Border Protection (CBP) officials stand during a routine checkpoint at the Brownsville-Matamoros International Bridge on the U.S.-Mexico border, seen from Matamoros, Tamaulipas, Mexico June 28, 2019. REUTERS/Carlos Jasso

A Jordanian money changer exchanges currency for customers during their travel to Syria, at Jordan's Jaber border crossing, near Syria's Nassib checkpoint, near Mafraq, Jordan, October 25, 2018. Picture taken October 25, 2018. REUTERS/Muhammad Hamed

A German customs officer stops a taxi during a raid looking for illegal workers in restaurants, at constructions sites and in the logistics sector in Cologne, Germany September 11, 2018. REUTERS/Wolfgang Rattay

Street vendors wait for customer next to a police checkpoint in the Kurdish-dominated southeastern city of Diyarbakir, Turkey June 22, 2018. REUTERS/Sertac Kayar

A child travelling with a caravan of migrants from Central America receives money from a passerby near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility on Sunday, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

A child traveling with a caravan of migrants from Central America reacts near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido TPX IMAGES OF THE DAY

A child who travels with a caravan of migrants from Central America, reacts near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido TPX IMAGES OF THE DAY

A child who travels with a caravan of migrants from Central America, reacts near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido TPX IMAGES OF THE DAY

A child who travels with a caravan of migrants from Central America, reacts near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

A child traveling with a caravan of migrants from Central America sleeps near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

A child traveling with a caravan of migrants from Central America sleeps near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

A child traveling with a caravan of migrants from Central America sleeps near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 30, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A member of a caravan of migrants from Central America sleeps near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A foot of a member of a caravan of migrants from Central America is pictured as he sleeps near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A member of a caravan of migrants from Central America sleeps near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A man and his son, members of a caravan of migrants from Central America, sleep near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A member of a caravan of migrants from Central America looks at his mobile phone as he gets ready to spend the night near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido TPX IMAGES OF THE DAY

Members of a caravan of migrants from Central America get ready to spend the night near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America get ready to spend the night near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A member of a caravan of migrants from Central America looks at his mobile phone as he gets ready to spend the night near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

Members of a caravan of migrants from Central America get ready to spend the night near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A girl and other members of a caravan of migrants from Central America get ready to spend the night near the San Ysidro checkpoint after a small group of fellow migrants entered the United States border and customs facility, where they are expected to apply for asylum, in Tijuana, Mexico April 29, 2018. REUTERS/Edgard Garrido

A man rides his bike up to a U.S. Customs and Border Protection checkpoint at the Mexico-U.S. border port of entry in Hidalgo, Texas, U.S., April 13, 2018. REUTERS/Loren Elliott

Alice Mullen from Monaghan in the Republic of Ireland does her shopping at a former customs post on the border in Middletown, Northern Ireland, December 9, 2017. "I'd be very worried if it was a hard border, I remember when people were divided. I would be very afraid of the threat to the peace process, it was a dreadful time to live through. Even to go to mass on a Sunday, you'd have to go through checkpoints. It is terribly stressful," said Mullen. "All those barricades and boundaries were pulled down. I see it as a huge big exercise of trust and I do believe everyone breathed a sigh of relief." REUTERS/Clodagh Kilcoyne SEARCH "KILCOYNE BORDER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Karelys Betancourt (C) looks at men pushing a cart loaded with luggage which belongs to people traveling by bus from Caracas to Ecuador in San Antonio del Tachira, Venezuela, November 8, 2017. Since 2015, vehicular traffic between Venezuela and Colombia has been restricted, so the first stage of the trip ends in the Venezuelan border city of San Antonio de Tachira. There, travelers have to leave the first bus and carry all their luggage as they cross by feet to the Colombian side, after going through several customs checkpoints and getting their passport stamped. REUTERS/Carlos Garcia Rawlins SEARCH "RAWLINS BUS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A Nepali citizen, who entered illegally to Honduras, has his iris scanned for biometrics after being detained at a police checkpoint during a tour for U.S. Customs and Border Protection Commissioner Gil Kerlikowske (not pictured) to show the procedures to detect and stop illegal immigrants in Tegucigalpa, Honduras, August 25, 2016. REUTERS/Jorge Cabrera

A policeman takes a mugshot of a Nepali citizen, who entered illegally to Honduras, after being detained at a police checkpoint during a tour for U.S. Customs and Border Protection Commissioner Gil Kerlikowske (not pictured) to show the procedures to detect and stop illegal immigrants in Tegucigalpa, Honduras, August 25, 2016. REUTERS/Jorge Cabrera

Policemen escort Nepalese citizens, who entered illegally to Honduras, after being detained at a police checkpoint during a tour for U.S. Customs and Border Protection Commissioner Gil Kerlikowske (not pictured) to show the procedures to detect and stop illegal immigrants in Tegucigalpa, Honduras, August 25, 2016. REUTERS/Jorge Cabrera

A policeman checks the tattoo of a Nepali citizen, who entered illegally to Honduras, after being detained at a police checkpoint during a tour for U.S. Customs and Border Protection Commissioner Gil Kerlikowske (not pictured) to show the procedures to detect and stop illegal immigrants in Tegucigalpa, Honduras, August 25, 2016. REUTERS/Jorge Cabrera

U.S. Customs and Border Protection Commissioner Gil Kerlikowske (C) tours a police checkpoint to check the procedures to detect and stop illegal immigrants in Tegucigalpa, Honduras, August 25, 2016. REUTERS/Jorge Cabrera

U.S. Customs and Border Protection Commissioner Gil Kerlikowske (C) tours a police checkpoint to check the procedures to detect and stop illegal immigrants in Tegucigalpa, Honduras, August 25, 2016. REUTERS/Jorge Cabrera

Policemen guide a vehicle transporting South Korean employees working at the KIC (Kaesong industrial complex) as they return from KIC on the Grand Unification Bridge, just south of the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

Policemen guide a vehicle transporting South Korean employees working at the KIC (Kaesong industrial complex) as they return from KIC on the Grand Unification Bridge, just south of the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

Workers unload products made in Kaesong Industrial Complex (KIC) after returning from KIC near the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A journalist work at a checkpoint on the Grand Unification Bridge which leads to Kaesong Industrial Complex (KIC) in North Korea, just south of the demilitarized zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

Workers unload products made in Kaesong Industrial Complex (KIC) after returning from KIC near the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

Workers unload products made in Kaesong Industrial Complex (KIC) after returning from KIC near the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A South Korean security guard stands guard on an empty road which leads to the Kaesong Industrial Complex (KIC) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. The Korean characters on the gateway reads "Inter-Korean Transit Office". REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

South Korean soldiers stand guard at a gateway which leads to the Kaesong Industrial Complex (KIC) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

South Korean officials check a vehicle carrying a products made in the Kaesong Industrial Complex (KIC) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

South Korean soldiers stand guard at a gateway which leads to the Kaesong Industrial Complex (KIC) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A South Korean employee working at North Korea's Kaesong Industrial Complex (KIC) is surrounded by media at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A security guard stands guard at a gateway which leads to the Kaesong Industrial Complex (KCI) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A security guard directs traffic as South Korean vehicles transporting employees working at North Korea's Kaesong Industrial Complex (KIC) pass a gateway which leads to the Kaesong Industrial Complex (KCI) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A security guard directs traffic as South Korean vehicles transporting employees working at North Korea's Kaesong Industrial Complex (KIC) pass a gateway which leads to the Kaesong Industrial Complex (KCI) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A security guard directs traffic as South Korean vehicles transporting employees working at North Korea's Kaesong Industrial Complex (KIC) pass a gateway which leads to the Kaesong Industrial Complex (KCI) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A South Korean soldier stands guard at a checkpoint on the Grand Unification Bridge which leads to the inter-Korean Kaesong Industrial Complex in North Korea, just south of the demilitarized zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

A South Korean soldier sets up a barricade at a checkpoint on the Grand Unification Bridge which leads to the inter-Korean Kaesong Industrial Complex in North Korea, just south of the demilitarized zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

South Korean soldiers stand guard at a gateway which leads to the Kaesong Industrial Complex (KCI) at the South's CIQ (Customs, Immigration and Quarantine), just south of the demilitarised zone separating the two Koreas, in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji

Belarussian custom officers smile at an arrival checkpoint at Minsk's International Airport, Belarus December 15, 2015. REUTERS/Vasily Fedosenko