From The Register:

Business and government leaders from the US, UK and three other countries will spend much of this week simulating and defending against a large-scale cyber attack in an exercise designed to strengthen coordinated responses to what many perceive as a growing threat.

The exercises are designed to sharpen and assess participants’ ability to respond to a multi-day, coordinated attack and better understand the “cascading effects” such attacks can have.

Scary and astonishing at the same time, as it possibly (eventually) may become a “physical war.”