https://www.nytimes.com/2014/02/06/us/months-later-sniper-attack-at-power-hub-still-a-mystery.html
I just remembered this for some reason.
and this http://www.dailymail.co.uk/news/article-2552290/Sniper-assault-US-electricity-grid-rehearsal-bigger-terrorist-attack-warns-industry-expert.html