If the immigration officer at the border of the U.S. allows the alien to be admitted into the U.S., the officer will issue an I-94 card and the alien obtains a legal status to remain in the United States for the specific purpose or purposes designated by the visa for a limited time. A legal status allows the alien to remain in the US for the intended purpose of the visit, while a visa allows an alien to apply for admission into the United States for a specific purpose. Status and a visa are separate concepts and one does not necessarily have to have to do with the other. Each can and often have separate expiration dates.
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