In the wake of the botched Christmas Day terror attack, members of Congress are worried that extremists could use the State Department's diversity visa lottery as a means of getting to the U.S.

The State Department is planning to welcome thousands of immigrants from terror-watch list countries into the United States this year through a "diversity visa" lottery -- a giant legal loophole some lawmakers say is a "serious national security threat" that has gone unchecked for years.

By Joseph Abrams -- Fox News Channel

Legal Immigration
visa lottery

Updated: Fri, Jan 8th 2010 @ 2:06pm EST