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.
Earth City, Missouri is an unincorporated community located in St. Louis County, along Interstate 70 near the Missouri River. It is bounded by the city of Bridgeton on the east and north, the city of Maryland Heights to the south, and the Missouri River to the west. It is also in proximity to Lambert International Airport. The town is notable as being home to the headquarters of the Save-A-Lot grocery chain and a major UPS shipping hub. It is a major business park bounded by I-70 on the south, I-270 on the east, and MO 370 to the north. It is also within 3 miles of 3 of the 4 major river crossing bridges over the Missouri River. At one time Express Scripts had its headquarters in Maryland Heights, near Earth City. Express Scripts announced in 2005 that it will build a new headquarters on the grounds of the University of Missouri-St. Louis. The company planned to break ground for the facility in late 2005 and move into the facility in March 2007. On June 8, 2007, Express Scripts opened its new world headquarters.