By James C. McKinely Jr. and Julia Preston
DALLAS - Eight years after the Sept. 11 terrorist
attacks and despite repeated mandates from Congress. the United States still has no
reliable system for verifying that foreign visitors have left the country.
New concern was focused on that security loophole
last week, when Hosam Maher Husein Smadi, a 19-year-old Jordanian who had overstayed his tourist visa, was accused in court
of plotting to blow up a Dallas skyscraper.
Last year alone, 2.9 million foreign visitors
on temporary visas like Mr. Smadi’s checked in to the country but never officially checked out, immigration officials
said. While officials say they have no way to confirm it, they suspect that several hundred thousand of them overstayed their
visas.
Smadi was arrested on charges he plotted to bomb a downtown Dallas skyscraper. Smadi
entered the United States legally, but then overstayed his visa.