He stopped between the two most popular booths, murmured something and pulled the cord on his vest.
Eleven thousand miles away, a man sat at his desk and leaned closer to his computer screen.
Having located his target, a truck driving north, he moved his cursor over the image and pushed a button on his keyboard.
Technically, asymmetric warfare is one-sided. But to the victims, all war is symmetrical. To the victims, there is no difference between pulling a cord and pushing a button.