A foreign visitor has her fingerprints taken at the International Arrivals Building at Dulles International Airport in Sterling. A foreign visitor has her fingerprints taken at the International Arrivals Building at Dulles International Airport in Sterling, Virginia, March 16, 2005. U.S. Secretary of Homeland Security Michael Chertoff observed "US-VISIT" at the airport, a program designed to screen foreign visitors travelling to the U.S. REUTERS/Shaun Heasley