00520nam a2200097Ia 450000500170000010000170001724500380003426000090007252003240008158300170040520260716043852.0  aTing, Jan C.  aImmigration and national security  c2006  aOpines that the greatest threat to U.S. homeland security comes from illegals who enter the country through its porous borders in order to attack.  Suggests that legal immigration itself needs reform, particularly the visa-waiver program and the rules governing dual citizenship, which pose further security challenges.  c3/6/08kJOYD