A security officer checks a traveler’s passport.
AP Photo/Patrick Semansky
How did governments get the power to limit people's movements in the first place? A historian explains.
A Border Patrol agent in New Mexico.
REUTERS/Jose Luis Gonzalez
Undocumented entries across the border are at all-time lows. The people now arriving are not Mexican workers, but a smaller number of Central American families seeking to escape dire circumstances.
African leaders meet in Kigali to sign the continent’s free trade agreement.
Continental free trade area's potential impact includes boosting intra-Africa trade, manufacturing exports, job creation and poverty alleviation.
US Attorney General Jeff Sessions speaks to law enforcement officers in St. Louis.
Trump's administration plans to ramp up prosecution of unauthorized border crossings. Here's the story of how it became illegal in the first place.
Irish Prime Minister Enda Kenny in March.
AP Photo/Geert Vanden Wijngaert
The Irish prime minister is in Washington for the annual shamrock photo op. But, with Trump in the White House, even usually placid U.S.-Irish relations are a bit dodgy.
Opening borders is the easiest way to tackle global poverty and it would make already wealthy countries richer, too.
The beefed up border between Bulgaria and Turkey.
Stefan Rousseau PA Archive
In an unequal, globalised world, should we be able to move between states as freely as we can within them?
These days neither the public nor governments consider passports as a serious obstacle to freedom of movement.
In the 20th century, governments considered the “total abolition” of passports as an important goal and discussed the issue in several international conferences.