The Department of Homeland Security has announced that it's finalizing plans to collect information from foreign visitors exiting the country through the nation's airports. DHS plans to collect fingerprints or eye scans as foreigners leave.
Officials estimate that 40 percent of illegal aliens first came into the country legally and overstayed their visa. The reason - the United States has no entry/exit system to determine when someone who enters the country actually leaves.
In 1996, Congress decided that it needed a way to track people who overstay their visas — a huge and understated part of the nation's illegal immigration problem. So it authorized a program to verify that visa holders who arrived in the country eventually left it.