The Boeing E-4 Advanced Airborne Command Post, with the project name "Nightwatch", is an aircraft operated by the United States Air Force (USAF). To create the E-4 series, four Boeing 747-200B airframes were specially modified to serve as a survivable mobile command post for the National Command Authority, namely the President of the United States, the Secretary of Defense, and successors. The four E-4Bs are operated by the 1st Airborne Command and Control Squadron of the 55th Wing located at Offutt Air Force Base, near Omaha, Nebraska. An E-4B is denoted a "National Airborne Operations Center" when in action. The E-4 fleet was originally deployed in 1974, when it was termed National Emergency Airborne Command Post (NEACP) (often pronounced "kneecap"). The aircraft was to provide a survivable platform to conduct war operations in the event of a nuclear attack. Early in the E-4's service, the media dubbed the aircraft as "the doomsday planes".[5] The E-4 was also capable of operating the "Looking Glass" missions of the Strategic Air Command (SAC). The aircraft were originally stationed at Andrews Air Force Base in Maryland, so that the U.S. President and Secretary of Defense could access them quickly in the event of an emergency. The name "Nightwatch" originates from the richly detailed Rembrandt painting, The Night Watch, that depicts local townsfolk protecting a town; it was selected by the Squadron's first commanding officer. Later, the aircraft were moved to Offutt Air Force Base where they would be safer from attack. Until 1994, one E-4B was stationed at Andrews Air Force Base at all times so the President could easily board it in times of world crisis. The E-4 fleet was originally deployed in 1974,[1] when it was termed National Emergency Airborne Command Post (NEACP) (often pronounced "kneecap"). The aircraft was to provide a survivable platform to conduct war operations in the event of a nuclear attack. Early in the E-4's service, the media dubbed the aircraft as "the doomsday planes".[5] The E-4 was also capable of operating the "Looking Glass" missions of the Strategic Air Command (SAC). The aircraft were originally stationed at Andrews Air Force Base in Maryland, so that the U.S. President and Secretary of Defense could access them quickly in the event of an emergency. The name "Nightwatch" originates from the richly detailed Rembrandt painting, The Night Watch, that depicts local townsfolk protecting a town; it was selected by the Squadron's first commanding officer. Later, the aircraft were moved to Offutt Air Force Base where they would be safer from attack. Until 1994, one E-4B was stationed at Andrews Air Force Base at all times so the President could easily board it in times of world crisis. All four produced are operated by the U.S. Air Force, and are assigned to the 1st Airborne Command Control Squadron (1ACCS) of the 55th Wing at Offutt Air Force Base, Nebraska. Maintenance and crews are provided by Air Combat Command. Operations are coordinated by the United States Strategic Command. When the President travels outside of North America using a VC-25A as Air Force One, an E-4B will deploy to a second airport in the vicinity of the President's destination, to be readily available in the event of a world crisis or an emergency that renders the VC-25A unusable. When the President visits Honolulu, Hawaii, an E-4B has often been stationed 200 miles away at Hilo International Airport on Hawaii Island.

Other items in other pictures are for your reference only, available in my eBay Store. They will make a great addition to your SSI Shoulder Sleeve Insignia collection. Our all US-Made Insignia patches here are NIR compliant with LIFETIME warranty. I will send replacement patch if you return the damaged patch under normal use.  I will send replacement patch if you return the damaged patch under normal use. 

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