In a paragraph why do you think that the United States government set up the procedures used at Ellis Island to screen newly arriving immigrants?

Ellis Island is a historical site that opened in 1892 as an immigration station, a purpose it served for more than 60 years until it closed in 1954. Located at the mouth of Hudson River between New York and New Jersey, Ellis Island saw millions of newly arrived immigrants pass through its doors. In fact, it has been estimated that close to 40 percent of all current U.S. citizens can trace at least one of their ancestors to Ellis Island.

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