Yes, Air Force One never travels alone; it is always supported by a highly coordinated "shadow" fleet. The most significant is the C-17 Globemaster III, which typically flies ahead of the President to transport the armored motorcade (including "The Beast"), Secret Service vehicles, and specialized communications equipment. Additionally, a Boeing E-4B "Doomsday Plane" often shadows Air Force One during sensitive international trips. The E-4B serves as a National Airborne Operations Center, designed to act as a mobile nuclear-hardened command hub in the event of a national emergency. On some routes, especially in higher-threat environments, F-15 or F-22 fighter jets may provide an escort, though this is often done out of public view. In 2026, as the new VC-25B aircraft (the upgraded 747-8i models) undergo final testing and phased introduction, these support protocols remain strictly enforced to ensure the President has full "continuity of government" capabilities anywhere in the world, backed by a massive logistical trail of fuel tankers and cargo support.