Fiber optic cable is not vulnerable to EMP, but the switches and controls that use microelectronics in conjunction with the fiber optic cable need to be protected.
Fiber optic cable is not vulnerable to EMP, but the switches and controls that use microelectronics in conjunction with the fiber optic cable are, and should be protected.
But it said it was uncertain whether such a system would have protected the Kent helicopter from catastrophic damage given the size of the cable involved.