Immigration law determines whether a person is an alien, the rights, duties, and obligations associated with being an alien in the United States, and how aliens gain residence or citizenship within the United States. It also provides the means by which certain aliens can become legally naturalized citizens with full rights of citizenship. Immigration law serves as a gatekeeper for the border of the nation, determining who may enter, how long they may stay, and when they must leave. Immigration lawyers represent persons seeking temporary and permanent residency (green cards) status in the U.S., those interested in obtaining U.S. citizenship through a process called naturalization, and clients facing deportation and removal. Immigration attorneys may also represent businesses seeking to secure temporary visa status for foreign employees.
Supai is a census-designated place (CDP) in Coconino County, Arizona, United States, within the Grand Canyon. As of the 1990 census, the CDP had a population of 423; the 2000 census erroneously recorded a population of 0. The capital of the Havasupai Indian Reservation, Supai is currently the only community in the United States where mail is still carried out by mules. It is also the most remote community in the lower 48 states, and the only way to get to it is to take a helicopter or to hike or ride a mule along the Havasupai Trail. Supai is eight miles (13 km) from the nearest road. There are no cars in the community.