Wasn't the large US/Canada blackout a decade or two ago caused by a tree? If so, then the question would be if Russia did plant that tree. We should look out f

Wasn't the large US/Canada blackout a decade or two ago caused by a tree? If so, then the question would be if Russia did plant that tree. We should look out for more suspicious trees in our immediate areas. See some tree squating where it shouldn't? Walnut or Vatnik? You can never be sure...