A 595th Command and Control Group E-4B receives fuel from a 126th Air Refueling Squadron KC-135R Stratotanker over the midwestern United States, May 15, 2024. The E-4B, known as the “Nightwatch,” is protected against the effects of electromagnetic pulse and has an electrical system designed to support advanced electronics and a wide variety of communications equipment. (U.S. Air Force photo by Tech Sgt. Codie Trimble)