The Department of Homeland Security has filed a brief in response to EPIC's petition for rehearing in the "Internet Kill Switch" case. EPIC is seeking the release of the public policy that allows the government to suspend cell phone service. The D.C. Circuit previously ruled that DHS may withhold the policy. EPIC pursued the shutdown policy after government officials disabled cell phone service during a peaceful protest in San Francisco. EPIC cited both free speech and public safety concerns and noted that the policy was never subject to public rule making. The Federal Communications Commission recently warned government agencies not to use "jammers," devices that block cell phone signals, because of public safety risks.