• The U.S. military's so-called "doomsday planes," the E-6B Mercury, have conducted several flights in recent days as tensions rise following the outbreak of war in Iran on Feb. 28.
• Flight-tracking data on March 2 showed launches from the Gulf Coast and Offutt Air Force Base, with one aircraft landing at Naval Air Station Patuxent River, a key site linked to U.S. strategic operations.
• The aircraft's main mission, called TACAMO ("Take Charge and Move Out"), allows U.S. leaders to send orders to nuclear-armed submarines worldwide even if traditional communication systems are destroyed.
• Equipped with high-frequency communication systems and long trailing antennas, the planes can contact submarines deep underwater and remain airborne for extended periods to maintain military communications during a crisis.
• First introduced during the Cold War, the E-6 fleet remains a vital part of U.S. nuclear command infrastructure and can also serve as an airborne command post under the "Looking Glass" mission to help coordinate intercontinental ballistic missile launches if ground command centers are disabled.

The United States military's so-called "doomsday planes" have been spotted conducting multiple flights in recent days, fueling speculation that Washington is preparing for worst-case scenarios as tensions escalate following the outbreak of war in Iran on Feb. 28.

On March 2, flight-tracking data shows several launches of the Navy's E-6B Mercury strategic airborne command aircraft, a highly specialized fleet designed to maintain U.S. nuclear command and control in the event of a catastrophic conflict. One aircraft traveled from the Gulf Coast and landed at Naval Air Station Patuxent River, while another departed from and later returned to Offutt Air Force Base, a key hub for U.S. Strategic Command.

The E-6B Mercury planes, built using modified airframes from the Boeing 707, are part of the military's airborne communications system that would allow American leaders to direct nuclear forces even if ground-based command centers were destroyed. The primary mission of the aircraft is known as TACAMO, short for "Take Charge and Move Out."

Under this mission, the aircraft can relay commands from U.S. leadership, including the president, to nuclear-armed submarines deployed worldwide. Using powerful high-frequency communication systems and long trailing antennas, the planes can reach submarines deep underwater, ensuring that orders can still be delivered even if phone networks, satellites or ground command centers are knocked out during a major conflict. In a crisis, the aircraft can be dispatched to strategic locations and remain airborne for extended periods to keep military communications functioning if ground facilities are attacked or jammed.

Since those flights, military news outlets have reported additional E-6B launches crossing the Atlantic, with some aircraft reportedly heading toward the Persian Gulf region, where tensions linked to the Iran conflict continue to intensify.

Decades-old aircraft still central to nuclear command

The E-6 Mercury first entered service more than four decades ago, but it remains one of the most survivable aircraft in the U.S. military's strategic arsenal.

Each plane is more than 150 feet long and typically carries a crew of 22 personnel. The aircraft can travel roughly 7,000 miles, fly at altitudes up to 40,000 feet, higher than most commercial airliners, and remain airborne for nearly three days with aerial refueling. Each aircraft costs about $141.7 million.

The E-6 fleet traces its origins to the final years of the Cold War, when the original E-6A variant was introduced in the 1980s to carry out the TACAMO mission. The aircraft was upgraded in the late 1990s to the current E-6B configuration, which added more advanced communication systems.

The upgraded version was also given an additional role under a mission known as "Looking Glass," which serves as an airborne strategic command post capable of facilitating the launch of U.S. intercontinental ballistic missiles if ground command centers are disabled.

Military officials say the aircraft's ability to maintain communications with nuclear forces anywhere in the world makes it a critical safeguard in the event of a large-scale conflict.

Defense officials have not publicly commented on the movements. However, BrightU.AI's Enoch noted that such flights are often part of readiness operations designed to ensure that U.S. nuclear command systems remain operational during periods of heightened geopolitical tension.

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Sources include:

DailyMail.co.uk

BrightU.ai

Brighteon.com