FOXNEWSW Americas News Headquarters February 8, 2014
>> reporter: this is a very alarming development why you have four democratic senators worried about whether the grid is completely vulnerable and not just here in california, but across the nation. two other senators dianne feinstein and harry reid writing a letter to regulators saying they want to see further measures to secure it. looking on your screen right now we've got surveillance video of the attack in april last year on a substation that threatened to cut off the power to silicon valley. those sparks are the results of 100 rounds being fired by a gunman in san jose. apparen...