The late Dr Peter Pry who was Executive Director of the Task Force on National and Homeland Security, stressed that the West was highly vulnerable to Chinese cyber-attacks, especially EMP attacks using hypersonic missiles, detonated in the stratosphere. But, hacking and more direct attacks upon the grid can be damaging too. It is thought to be not too difficult for terrorists to bring the grid down, as it is presently not hardened enough. He has shown in many books, that this is one of the military strategies of the PLA, to create chaos on the American homeland, and thus to divert the government from the main war effort. It will take very little discomfort, let alone a social collapse to bring diverse countries into a meltdown.