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.
Picher was a city in Ottawa County, Oklahoma, United States. It was formerly a center of lead and zinc mining. The population was 1,640 at the 2000 census. Discoveries of ground contamination and the possibility of a cave-in of mines under the city have prompted all of its population to evacuate, and the nearby town of Cardin is following suit. The town is within the boundaries of the Tar Creek Superfund site.