>>14943263 lb/pb

There have been 'practice' events:

Sniper attack on Utah substation highlights grid vulnerability

https://www.utilitydive.com/news/sniper-attack-on-utah-substation-highlights-grid-vulnerability/428202/

Sniper Attack On Calif. Power Station Raises Terrorism Fears

"The attack began just before 1 a.m. on April 16 last year, when someone slipped into an underground vault not far from a busy freeway and cut telephone cables.

"Within half an hour, snipers opened fire on a nearby electrical substation. Shooting for 19 minutes, they surgically knocked out 17 giant transformers that funnel power to Silicon Valley. A minute before a police car arrived, the shooters disappeared into the night.

"My personal view is that this was a dress rehearsal" for future attacks, added Mark Johnson, the former PG&E executive, according to Foreign Policy.

The Journal quotes Jon Wellinghoff — chairman of the Federal Energy Regulatory Commission at the time of the attack — as saying it was "the most significant incident of domestic terrorism involving the grid that has ever occurred" in the U.S.

https://www.npr.org/sections/thetwo-way/2014/02/05/272015606/sniper-attack-on-calif-power-station-raises-terrorism-fears