A group that claimed to be from Syria crosses the U.S.-Canada border in Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1162U

A group that claimed to be from Eritrea crosses the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1163Z

A group that claimed to be from Syria is detained by a Royal Canadian Mounted Police (RCMP) officer after they crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1165B

A Royal Canadian Mounted Police (RCMP) officer escorts a group that claimed to be from Syria after they crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS11657

Luggage sits on the United States side of the border after a woman who told police that she and her family were from Sudan is taken into custody by Royal Canadian Mounted Police (RCMP) officers after arriving by taxi and walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 12, 2017. Picture taken February 12, 2017. REUTERS/Christinne Muschi - RTSYNKT

A man who told police he was from Sudan is confronted by a Royal Canadian Mounted Police (RCMP) officer as he attempts to cross the U.S.-Canada border into Hemmingford, Quebec, Canada February 13, 2017. Picture taken February 13, 2017. REUTERS/Christinne Muschi - RTSYNN1

A man who said his name was Abdullah and that he was a student from Yemen walks towards the U.S.-Canada border to cross into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6Q3

Royal Canadian Mounted Police (RCMP) officers stand on a hill looking over the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi - RTSYNUJ

A man from Yemen is taken into custody by Royal Canadian Mounted Police (RCMP) officers after walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi - RTSYNT9

A man who claimed to be from Sudan runs for the border after taking his family's passports from a U.S. border patrol officer as he was detained after his family crossed the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi TPX IMAGES OF THE DAY - RTSZ6FZ

A man who told police he was from Mauritania drops on his knees as he arrives at the U.S.-Canada border into Hemmingford, Quebec, Canada February 13, 2017. Picture taken February 13, 2017. REUTERS/Christinne Muschi - RTSYNRM

A family that claimed to be from Sudan leaves a taxi to walk across the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6PO

A family claiming to be from Turkey cross the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVUD

A U.S. border patrol officer looks over with luggage by his feet after a family claiming to be from Sudan crossed the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6DN

Luggage from a group that claimed to be from Eritrea sits in the back of a Royal Canadian Mounted Police (RCMP) vehicle after they crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1163J

Children from a group that claimed to be from Eritrea sit in a Royal Canadian Mounted Police (RCMP) vehicle after they crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1164G

A woman that claimed to be from Syria cries as she is detained by a Royal Canadian Mounted Police (RCMP) officer after crossing the U.S.-Canada border in Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1165W

A man carries a child as a group that claimed to be from Syria crosses the U.S.-Canada border in into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS11661

A mother and her child are taken into custody by Royal Canadian Mounted Police (RCMP) officers after crossing U.S.-Canada border into Hemmingford, Quebec, Canada February 20, 2017. A group of four people crossed just as the RCMP was conducting a media tour of their facilities and the border. REUTERS/Christinne Muschi - RTSZJ69

A family claiming to be from Turkey have their passports checked by a Royal Canadian Mounted Police (RCMP) officer as a group that claimed to be from Haiti, though their passports said Republic of Chad, are detained at the back of the police vehicle after they crossed the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVTS

A man who told police he was from Mauritania is taken into custody by Royal Canadian Mounted Police (RCMP) officers after walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 13, 2017. Picture taken February 13, 2017. REUTERS/Christinne Muschi - RTSYNSE

A Royal Canadian Mounted Police (RCMP) officer carries a stroller from the border after a family claiming to be from Sudan crossed the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6F2

A man who claimed to be from Sudan has his and his family's passports checked by a U.S. border patrol officer at the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6QF

A woman walks towards the border to cross at the U.S.-Canada border after arriving in a taxi with a group that claimed to be from Syria into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala TPX IMAGES OF THE DAY - RTS1163C

A group that claimed to be from Eritrea crosses the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1164O

A group that claimed to be from Eritrea is detained by a Royal Canadian Mounted Police (RCMP) officer after they crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS11645

A woman who told police that she and her family were from Sudan is taken into custody by a Royal Canadian Mounted Police (RCMP) officer after arriving by taxi and walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 12, 2017. Picture taken February 12, 2017. REUTERS/Christinne Muschi - RTSYNI5

Two women claiming to be from Yemen are detained by a Royal Canadian Mounted Police (RCMP) officer after crossing the U.S.-Canada border into Hemmingford, Quebec, Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVYO

Two women claiming to be from Yemen are confronted by a Royal Canadian Mounted Police (RCMP) officer as they cross the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVT9

A man from Yemen crosses the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi - RTSYNTB

A family from Yemen crosses the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi - RTSYNSO

A Royal Canadian Mounted Police (RCMP) officer carries luggage back to their vehicles after a family claiming to be from Sudan crossed the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6E4

A group that claimed to be from Eritrea crosses the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1163Q

A man that claimed to be from Eritrea is detained by a Royal Canadian Mounted Police (RCMP) officer after he crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1164I

A group that claimed to be from Syria arrives at the U.S.-Canada border in Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1165X

A woman who told police that she and her family were from Sudan is taken into custody by Royal Canadian Mounted Police (RCMP) officers after arriving by taxi and walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 12, 2017. Picture taken February 12, 2017. REUTERS/Christinne Muschi TPX IMAGES OF THE DAY - RTSYNI3

A family from Yemen is taken into custody by Royal Canadian Mounted Police (RCMP) officers after walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi - RTSYNT2

A family claiming to be from Turkey are met by a Royal Canadian Mounted Police (RCMP) officer after they cross the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVU2

A man who claimed to be from Sudan looks back after being detained by Royal Canadian Mounted Police (RCMP) officers after running across the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6BB

A man from Yemen is taken into custody by Royal Canadian Mounted Police (RCMP) officers after walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi - RTSYNTJ

A man who claimed to be from Sudan looks out the taxi window as a U.S. border patrol officer checks his passport and visa at the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6PE

A woman that claimed to be from Syria cries as she is detained by a Royal Canadian Mounted Police (RCMP) officer after crossing the U.S.-Canada border with a group into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1162T

A man is detained by a Royal Canadian Mounted Police (RCMP) officer after he crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1163F

Royal Canadian Mounted Police (RCMP) officers speak with a man before he crosses the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1163G

A man that claimed to be from Syria is detained by a Royal Canadian Mounted Police (RCMP) officer after he crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1165A

A woman and children that claimed to be from Eritrea sit inside a Royal Canadian Mounted Police (RCMP) vehicle after being detained for crossing the U.S.-Canada border in Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS1164J

A man that claimed to be from Syria is detained by a Royal Canadian Mounted Police (RCMP) officer after he crossed the U.S.-Canada border into Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS11643

A woman that claimed to be from Syria crosses the U.S.-Canada border as a Royal Canadian Mounted Police (RCMP) officer waits to detain her in Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS11654

A Royal Canadian Mounted Police (RCMP) officer waits as a group that claimed to be from Syria arrives at the U.S.-Canada border in Hemmingford, Quebec, Canada March 2, 2017. REUTERS/Dario Ayala - RTS11658

A woman who told police that she and her family were from Sudan is taken into custody by Royal Canadian Mounted Police (RCMP) officers after arriving by taxi and walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 12, 2017. Picture taken February 12, 2017. REUTERS/Christinne Muschi - RTSYNLN

The children of a woman who told police that she and her family were from Sudan are placed in a vehicle as they are all taken into custody by Royal Canadian Mounted Police (RCMP) officers after arriving by taxi and walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 12, 2017. Picture taken February 12, 2017. REUTERS/Christinne Muschi - RTSYNLQ

A man who told police that he was from Sudan is taken into custody by Royal Canadian Mounted Police (RCMP) officers after arriving by taxi and walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 13, 2017. Picture taken February 13, 2017. REUTERS/Christinne Muschi - RTSYNOK

Two women claiming to be from Yemen have their passports checked by a U.S. border agent before crossing the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVTA

A man who claimed to be from Sudan has his and his family's passports checked by a U.S. border patrol officer at the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6R0

Royal Canadian Mounted Police (RCMP) officers assist a child from a family that claimed to be from Sudan as they walk across the U.S.-Canada border into Hemmingford, from into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6KD

A man who claimed to be from Sudan throws his family's suitcases towards the border as he is detained by a U.S. border patrol officer after his family crossed the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6NV

A family claiming to be from Turkey are placed in a Canadian Mounted Police (RCMP) vehicle after they crossed the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVU1

A man who claimed to be from Sudan throws his suitcases toward the border as he is detained by a U.S. border patrol officer after his family crossed the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6D7

A man who told police that he was from Mauritania is helped up a hill and taken into custody by Royal Canadian Mounted Police (RCMP) officers after walking across the U.S.-Canada border into Hemmingford, Quebec, Canada February 13, 2017. Picture taken February 13, 2017. REUTERS/Christinne Muschi - RTSYNRT

Royal Canadian Mounted Police (RCMP) officers assist a child from a family that claimed to be from Sudan as they walk across the U.S.-Canada border into Hemmingford, Canada, from Champlain in New York, U.S., February 17, 2017. REUTERS/Christinne Muschi - RTSZ6CG

A family from Yemen crosses the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi - RTSYNSJ

Two women claiming to be from Yemen are confronted by a Royal Canadian Mounted Police (RCMP) officer as they cross the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVTF

A woman claiming to be from Yemen wipes tears from her eyes as she is told by Canadian police not to enter the U.S.-Canada border into Hemmingford, Quebec Canada February 22, 2017. The woman crossed the border despite being told not to and was then arrested. REUTERS/Christinne Muschi TPX IMAGES OF THE DAY - RTSZVXS

A group that claimed to be from Haiti, though their passports said Republic of Chad, are detained by a Royal Canadian Mounted Police (RCMP) officer after they crossed the U.S.-Canada border into Hemmingford, Quebec, Canada February 22, 2017. REUTERS/Christinne Muschi - RTSZVX4