The US Air Force's Boeing E-4B 'Nightwatch', known as the 'Doomsday Plane', made a rare public appearance, flying over Washington D.C. and landing in Los Angeles. This aircraft serves as a survivable airborne command center for national emergencies, including nuclear war, and is designed to maintain government continuity if ground command centers are destroyed. While the Pentagon has not provided an official reason for the flights, its appearance amid heightened global tensions has fueled speculation about potential U.S. preparations for extreme scenarios.