Entry to the United States, authorized by a U.S. immigration inspector, part of the Department of Homeland Security (DHS). When you come from abroad and first arrive in the U.S, the visa allows you to travel to the port-of entry and request permission to enter the U.S. Admission or entering the U.S., by non-United States citizens must be authorized by a U.S. Immigration inspector at the port-of- entry, who determines whether you can enter and how long you can stay here, on any particular visit. If you are allowed to enter, how long you can stay is and the immigration classification you are given, is shown as a recorded date or Duration of Status (D/S) on Form I-94, Arrival-Departure Record, or Form I-94W, if arriving on the Visa Waiver Program. If you want to stay longer than the date authorized, you must request permission of the Department of Homeland Security's Bureau of Citizenship and Immigration Services (BCIS). Go to the BCIS Internet site to learn more.