![A march in downtown Los Angeles on May Day in 2006.](/sites/default/files/styles/large/public/May_Day_Immigration_March_LA47.jpg?itok=4nvaLc1S)
![Mexican workers wait in Mexicali for legal employment in the U.S.](/sites/default/files/styles/large/public/MexicaliBraceros%2C1954.jpg?itok=at2lZmTs)
![Statue honoring immigrants in Rosario, Argentina.](/sites/default/files/styles/large/public/Monumento_al_Inmigrante%2C_Rosario_1.jpg?itok=iQevTT3n)
![This building was the 'Immigrants Hotel.'](/sites/default/files/styles/large/public/Hotel_Inmigrantes_Buenos_Aires.jpg?itok=M0lUKSxI)
![Students sit in on Senator John McCain's office during a protest.](/sites/default/files/styles/large/public/Dreamers_AZ_Sit-in_5-17-10.jpg?itok=oG7SP585)
![This notice sits on the border between Canada and the United States.](/sites/default/files/styles/large/public/800px-US-border-notice.jpg?itok=5vw-5VM8)
![The Statue of Liberty in New York.](/sites/default/files/styles/large/public/640px-Statue_of_Liberty_7.jpg?itok=VUloFR-a)
![This is a sign at the U.S. - Mexico border.](/sites/default/files/styles/large/public/Bp_scam.jpg?itok=jp3dTsHl)
![Immigrant children on the grounds of the Immigrants Hotel.](/sites/default/files/styles/large/public/1912%20Hotel%20de%20Inmigrantes.jpg?itok=SrUlgNS8)
Immigrant children on the grounds of the Immigrants Hotel in Buenos Aires, Argentina
Credit: Wikimedia Commons/Archivo General de la Nación Argentina
![Young immigrant girl in turn-of-the-century Buenos Aires.](/sites/default/files/styles/large/public/Immigrant%20Girl%20Argentina%20end%2019%20beg%2020%20c.jpg?itok=-Xv1KpLq)
Young immigrant girl in turn-of-the-century Buenos Aires
Credit: Wikimedia Commons/Archivo General de la Nación Argentina
![Immigrants from the Ottoman Empire in Buenos Aires.](/sites/default/files/styles/large/public/Turcos%201902.jpg?itok=rTMzDpqK)
Immigrants from the Ottoman Empire in Buenos Aires, Argentina, March 1902
Credit: Archivo General de la Nación Argentina
![An immigrant family enjoying lunch in Buenos Aires.](/sites/default/files/styles/large/public/138546_A.jpg?itok=5byOJdaC)
An immigrant family enjoying lunch, Buenos Aires, Argentina, March 1905 Credit: Archivo General de la Nación Argentina
![Arrival of immigrants in Buenos Aires.](/sites/default/files/styles/large/public/146213_A.jpg?itok=PVZ6qQYr)
Arrival of immigrants in Buenos Aires, Argentina, August 1912
Credit: Archivo General de la Nación Argentina
![Two 'castaways' from Syria.](/sites/default/files/styles/large/public/146219_A_0.jpg?itok=yrf0IIgA)
Two "castaways" from Syria, Buenos Aires, Argentina, August 1906
Credit: Archivo General de la Nación Argentina
![Interior patio in the home of Syrian immigrants.](/sites/default/files/styles/large/public/155002_A.jpg?itok=VivNZPeL)
Interior patio in the home of Syrian immigrants, Tres Sargentos Street, Buenos Aires, Argentina, March 1902
Credit: Archivo General de la Nación Argentina
!['Gypsies' arriving in Buenos Aires.](/sites/default/files/styles/large/public/166674_A.jpg?itok=98ajgAkT)
"Gypsies" arriving in Buenos Aires, March 1911
Credit: Archivo General de la Nación Argentina
![Senegalese immigrants arrived in Buenos Aires destined for work in a sugar factory.](/sites/default/files/styles/large/public/323373_A.jpg?itok=q9SM91AI)
Senegalese immigrants arrived in Buenos Aires destined for work in a sugar factory in the northwestern province of Tucumán, April 1899
Credit: Archivo General de la Nación Argentina
![A U.S. Border Patrol poster placed around the border with Mexico.](/sites/default/files/styles/large/public/23-border-poster-full%20CBP%20poster.jpg?itok=5MLXhZvC)
A U.S. Border Patrol poster placed around the border with Mexico. It translates: "I thought that it would be easy for my son to get papers [e.g. legal status/work rights] in the North. It was not true. Our children are our future. Let’s protect them.”
![A railway known as La Bestia transports Central American migrants.](/sites/default/files/styles/large/public/Central_american_migrants_mexico.jpg?itok=VtlpqQgC)
![This monument is dedicated to the immigrant population.](/sites/default/files/styles/large/public/Monumento_ao_Imigrante2.jpg?itok=j24Q7ERH)