Foreign nationals who desire to come to the United States temporarily have a variety of options. United States law provides for different types of non-immigrant visas that authorize an individual to come to and remain in the United States.
United States immigration law distinguishes between "immigrants" and "non-immigrants". An immigrant is someone who is coming to the United State with the intention of residing in the United States indefinitely.
Immigration to the United States is a common, world-wide desire. Every year, thousands upon thousands of people from all over the world attempt to legally immigrate to America. The reasons vary: some come for freedom from tyranny and opression, others for economic opportunity.