Example image of eyePlorer eyePlorer map for 'Ground Wave Emergency Network': Command and control Military communications Nuclear warfare Deterrence Electromagnetic pulse High-altitude nuclear explosion Emergency Action Message Power surge Array Band (radio) Contiguous United States Low frequency Radio Transceiver Ronald Reagan Ultra high frequency Longwave Soviet Union California Massachusetts Oregon Pennsylvania James R. Schlesinger Michael Dukakis Cold War Survivable Low Frequency Communications System United States Air Force Milstar Differential GPS Emergency Rocket Communications System Post Attack Command and Control System GWEN Waveguide (electromagnetism)