Janet Napolitano scraps U.S.-Mexico fence By JEN DIMASCIO | 3/16/10 7:14 PM EDT Homeland Security Secretary Janet Napolitano has put the brakes on SBInet, the $3 billion plan to build a virtual fence along the U.S. border with Mexico. “Not only do we have an obligation to secure our borders, we have a responsibility to do so in the most cost-effective way possible,” Napolitano said in a statement Tuesday. “The system of sensors and cameras along the Southwest border known as SBInet has been plagued with cost overruns and missed deadlines.” With that in mind, Napolitano is withholding funding for...