The National Archives maintains a wealth of records relating to immigration and naturalization in the 20th century. This includes more than one million Alien Case Files, or "A-Files", at its facilities in San Francisco, California, and Kansas City, Missouri. Created beginning in 1944, these files relate to noncitizen alien residents of the United States and are a potential wealth of genealogical information. Speaker Marisa Louie Lee will discuss what's in the A-Files, who is documented in them, how to find them at the National Archives, and how to access records that remain with U.S. Citizenship and Immigration Services (USCIS).