The greatest threat to U.S. homeland security comes from illegals who enter the country through its porous borders in order to attack. The tide of illegal immigration must be stemmed in order to secure the United States against terrorism. It is all too easy for illegal immigrants to slip in beneath the radar, eschewing the legalization process and never being detected and deported. And as long as the benefits of illegally immigrating outweigh the costs, the influx will continue. Legal immigration itself needs reform, too; particularly the visa-waiver program and the rules governing dual citizenship, which pose further security challenges. Federal government officials must overcome their fear of alienating ethnic voters and American business, enhance border security, and reform the nation’s immigration policies.