What is one responsibility that is only for United States citizens? (65/20 version)

Serving on a jury and voting in a federal election are responsibilities reserved only for U.S. citizens; either answer is accepted on this 65/20 civics question. While everyone in the United States must obey the law and pay taxes, jury duty and voting in federal elections are rights and responsibilities limited to citizens. Naturalization grants these civic responsibilities, which is part of why the test emphasizes them. Distinguishing citizen-only responsibilities (jury service, federal voting) from duties shared by all residents (obeying laws, paying taxes) is a key rights-and-responsibilities concept.