California's Santa Clara County has decided to establish ICE-free zones throughout Silicon Valley. The Board of Supervisors voted Tuesday to raise physical barriers and lock gates to prevent federal immigration agents from using county property for surveillance and arrests. The county plans to put up signs to warn U.S. Immigration and Customs Enforcement agents away from those properties. The county is following Chicago's lead to block immigration enforcement without a court order. Santa Clara County has already expanded a plan to coordinate a counter-response to ICE raids by offering legal aid, shelter, food, child care and other assistance to immigrants.