For much of the post-Cold War era, the idea of Russia launching a direct attack on the North Atlantic Treaty Organization (NATO) seemed almost unthinkable. But that assumption is disappearing. As the war in Ukraine drags on, Europe is preparing for the possibility that peace will not last.
Troops are being moved east, borders are being fortified, ammunition factories are expanding, and air defenses are being strengthened, all while governments strategize on the best way to deter Russia from an imminent attack.
But how, exactly, are countries across Europe preparing for this? Click on to see.