For people who never leave their native countries, citizenship is simple as pie -- you simply have to be born. But being a citizen entails a lot more than just living in a nation. Test your knowledge about what it means to be a citizen.
Under UN rules, a child born on an airplane is recognized as an official citizen of the country to which that plane is registered.
In both the United States and Australia, citizens aren't allowed to have numbers in their name. Just ask the Aussie parents who tried to name their child 4Real.
Unmarried adult children of U.S. citizens are given first preference for immigration to the U.S.
Fatima Nevic, the estimated 6 billionth citizen in the world, was born in Sarajevo, Bosnia, on Oct. 12, 1999.
Until 2011, the first three numbers in a social security number (the area number) were based on the zip code or state code where the person lives or was born.
While passports have been used in some form for centuries, it wasn't until an executive order was signed in the United States in 1915 requiring all U.S. citizens leaving the country to have a passport that they began to be codified around the world.
In 1946, after World War II, Canada passed a citizenship act that recognized residents as Canadian citizens, not British.
International waters begin 12 miles off the coast of a nation. It's here that jurisdiction becomes murky.
Easter Island's residents are citizens of Chile.
In 1924, the U.S. government granted blanket citizenship to all native-born American Indians in recognition of Native Americans' service in World War I.