00491nam a2200085Ia 4500100001700000245003800017260000900055520032400064583001700388  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