U.S. Citizenship and Immigration Services announced today that it planned to transfer tens of thousands of registration files of immigrants to the National Archives, creating a permanent and comprehensive record of their journey to the United States.

The archival processing of about 135,000 files -- which contain personal, historical and genealogical information -- could be completed by next summer and available for public access, officials said in a statement.

No other type of case file contains the same level of comprehensive personal data of immigrants and their request for resident status and citizenship, officials said. This ensures that the records contained within the A-file will be retained forever at the National Archives.

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