Napolitano: Borders Are Secure; US Needs Verification Program

Thinks business demand for immigrants is the problem

The U.S. border is secure and it is time to move forward on comprehensive immigration overhaul, Department of Homeland Security Secretary Janet Napolitano told ABC News in an exclusive interview.

"My belief is that you need to fix the entire system because, from my standpoint, one of the biggest draws of illegal traffic across the border is the demand for illegal labor," she said Thursday.

"And until you have a natural -- a nationwide system, for employers to be able to verify their employees, it's really tough to get at that demand side."