PUEBLO, Colo. (KOAA) — Fly Pueblo shared details on a unique visitor to social media on Thursday. You can view a video of the plane below:"Another really cool very rare sighting at the Pueblo Memorial Airport," Fly Pueblo posted to Facebook. "The US Air Force E-4B 'Nightwatch' affectionately known as the Doomsday Plane made quite a few touch and go pattern work today." The "Doomsday Plane" was also spotted flying over Colorado Springs back in March. The E-4B fleet is expected to be replaced in the coming years by the Survivable Airborne Operations Center, or SAOC, a next-generation airborne command platform now under development.