Parents arrive to pick up their children from a school in Montgomery, Ala. After a tough immigration law was enacted in 2011, Hispanic students began to disappear from classrooms in the state's public schools. Dave Martin/AP hide caption

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Migrants arrive in Valletta, the Maltese capital, aboard a patrol boat on Oct. 12, a day after their boat sank, killing more than 30 people, mostly women and children — just the latest deadly migrant tragedy to hit the Mediterranean. Despite Europe's financial crisis illegal immigrants continue to attempt to enter Europe through its southern coastal countries as they seek a better life. AFP/Getty Images hide caption

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Demonstrators supporting an immigration overhaul stage a sit-down protest at the offices of Rep. Mario Diaz-Balart, R-Fla., on Oct. 11. Lynne Sladky/AP hide caption

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A man relaxes at a downtown park in Seoul. The pronounced demographic shift triggered by a plummeting birth rate and soaring life expectancy is seen as one of the greatest challenges facing Asia's fourth-largest economy. Kim Jae-Hwan/AFP/Getty Images hide caption

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A chocolate cake is shaped like Europe, with new EU members Romania and Bulgaria (far right), at a welcoming ceremony for their entry into the bloc on Dec. 14, 2006. Curbs on the movement of citizens of the two countries end on Jan. 1, raising fears in Western Europe of an influx of Bulgarian and Romanian workers. Thierry Charlier/AP hide caption

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The Senate has passed a sweeping immigration bill, widely seen as the product of the "Gang of 8," a group that includes Sens. John McCain, R-Ariz. (left), and Sen. Chuck Schumer, D-N.Y. The two shook hands before Thursday's final vote. J. Scott Applewhite/AP hide caption

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Construction is underway on the Itaquerao stadium in Sao Paulo, shown here June 12. The stadium will be the venue for the opening ceremony and game of the 2014 FIFA World Cup in Brazil, and many migrants are among the laborers working on the project. Sebastiao Moreira/EPA/Landov hide caption

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