Our nation's greatest and most obvious vulnerability remains our pourous and unprotected southern land border. Yet every day, unknown numbers of human and drug smugglers, criminals and potential terrorists continue to illegally enter the United States. And yet the best and most effective way of preventing illegal foot and vehicle traffic from entering is border security fencing. Since construction of the San Diego border fence began in 1996, the smuggling of people and narcotics has dropped drastically; crime rates have been reduced by half, according to FBI statistics; vehicle drive-throughs have been eliminated. Recognizing this success, Congress passed and President...