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.
Climax was an unincorporated mining village and a former U.S. Post Office located in Lake County, Colorado. Climax was known for its large molybdenum ore deposit. The former Climax Post Office had the ZIP Code 80429. Climax is now an uninhabited ghost town, located along the Continental Divide at an elevation of about 11,360 feet (3465 meters). It was the highest human settlement in the United States, and it holds the record for having had the country's highest Post Office and the highest railroad station. The residential houses were all transported to the West Park subdivision of Leadville, Colorado, before 1965, leaving only the mining buildings standing.