A visa is an endorsement placed on a foreign person's passport indicating that they may enter and leave the United States. It also shows how long the person may remain in the country. There are dozens of types of visas issued for different circumstances, but there are two main categories of visas: Nonimmigrant Visas and Immigrant Visas. Immigrant visas are given to people who plan to stay in the country permanently upon arrival. Nonimmigrant visas are as you might expect, issued to those who plan temporary visits.
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