US VISIT and EXIT System
"The United States Visitor Immigration Status Indicator Technology (US-VISIT) program is one of the most important and ambitious immigration program enhancements ever undertaken. . .When it is fully implemented, US-VISIT will also help ensure the integrity of the entire non-immigrant visa system by authenticating all travelers identity and by recording both entries and departures. It will help us know that travelers are who they say the are and help ensure that they leave when they are supposed to."