Eurotunnel Class 9000 electric locomotive trains

Driving along the US Mexican border

Wire Fencing At Calais Port

Barbed Wire Fencing In Calais

Greek soldiers guard Syrian migrants fleeing the war and escaping to Europe, who have landed on the Greek island of Lesvos on the north coast at Efthalou. Up to 4,000 migrants a day are landing on the island and overwhelming the...

Greek soldiers guard Syrian migrants fleeing the war and escaping to Europe, who have landed on the Greek island of Lesvos on the north coast at Efthalou. Up to 4,000 migrants a day are landing on the island and overwhelming the...

360/VR: A U.S. Customs and Border Protection A-Star helicopter flies along the U.S.-Mexico border fence on February 21, 2018 near McAllen, Texas. Federal border agents were searching for undocumented immigrants crossing the Rio Grande...

360/VR: A U.S. Customs and Border Protection Black Hawk helicopter flies along the U.S.-Mexico border on February 21, 2018 near McAllen, Texas. Federal border agents were searching for undocumented immigrants crossing the Rio Grande from...

Kevin McGuire at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Woody Keppel and Dennis Lemoine at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Lenise Soren at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Joanie 'Chynna' Laurer at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Joanie 'Chynna' Laurer at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Motown Group The Killer Flamingos at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Joanie 'Chynna' Laurer at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Lenise Soren at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Joanie 'Chynna' Laurer at the 'Illegal Aliens' New York Premiere at Tribeca Cinemas in New York, New York on March 1, 2006. (Footage by WireImage Video/Getty Images)

Eurotunnel trains driving into Channel Tunnel

Refugees and migrants at a detention centre

Shoppers in McAllen buying tax free goods

Cars going through checkpoint from Texas to Mexico

Refugees and migrants at a detention centre

Refugees and migrants at a detention centre

Refugees and migrants at a detention centre