Millions of foreign visitors to the United States, already under strict scrutiny since the 2001 terrorist attacks, soon will have to be fingerprinted and photographed to get through the nation’s airports and seaports. On Tuesday, the Department of Homeland Security announced plans for a high-tech system that will help track the 24 million foreigners who enter the country with work, student or travel visas each year. Congress ordered the system after the Sept. 11 attacks, when officials learned that two of the 19 hijackers had violated the terms of their visas. The program’s goal is to prevent potential terrorists from entering the country and to register foreigners who are allowed in. It also requires foreigners to check out when they leave so officials can look for people who stay after their visas expire. Full Story