9/11 forced USAFE’s first-ever NATO Article 5 shift within hours

Historical highlights: How 9/11 reshaped USAFE’s mission

Nearly 3,000 people died on September 11, 2001, and the resulting shockwave transformed how the United States military operated across the globe, including throughout Europe.

For U.S. Air Forces in Europe, the attacks triggered an urgent overhaul of security protocols, force readiness, and strategic priorities that would define the command for the next quarter century.

That morning, four commercial planes fell into the hands of terrorists along the American East Coast. Two crashed into the World Trade Center towers in New York City. A third slammed into the Pentagon. Passengers and crew aboard United Airlines Flight 93 fought back, forcing the aircraft down in a Pennsylvania field before it could reach another target.

The official death toll reached 2,977, with countless others later succumbing to illnesses tied to the attacks and their aftermath.

Meanwhile, across USAFE installations in Europe, the attacks landed during the afternoon due to the time difference. Personnel were nearing the end of their shifts when the news broke. Security forces scrambled to lock down bases as commanders confronted an unsettling question: were these hijackings isolated, or the opening salvo of a wider assault on American interests abroad?

The response quickly spread beyond U.S. bases.

For the first and only time in NATO history, allies invoked Article 5, declaring that an attack against one member constituted an attack against all. European partners responded with both solidarity and concrete military support.

Under the command of U.S. Air Force Gen. Gregory Martin, USAFE normalized heightened security measures while simultaneously directing planning for potential combat operations. Those preparations fed into what became the Global War on Terror.

USAFE contributed aircraft and airmen to Operation Enduring Freedom and later Operation Iraqi Freedom. European bases hosted tanker forces, enabled air mobility missions, and served as vital logistical hubs connecting American forces to operations farther east.

Those responsibilities persist today. USAFE-AFAFRICA still provides forward-based forces and partnerships that allow the U.S. and its allies to project airpower across Europe, Africa, and beyond.

The legacy of September 11 extends far beyond military operations. It lives in the memory of those killed, the bravery of first responders, and the service members who answered the nation’s call in the years that followed.