South Carolina Gov. Mark Sanford on Wednesday implored federal regulators to let South Carolina jam the signals of cell phones being used illicitly by prisoners, urging the Federal Communications Commission to act on a nearly two-year-old request from Corrections Dept. Director Jon Ozmint to conduct a pilot jamming program inside a state prison. Ozmint says 30 other states signed on to that request.The FCC has taken no action on the petition. Regulators say a 1934 law allows only federal agencies, not state or local ones, to jam public airwaves.Learn more from Bloomberg Business Week.