This was a panel by the EMPact America folks, and centered on EMP affects and impacts, and also tied into Iran threat. A portion of the overall issues related to electric grid resiliency, but certainly an impactful event if it occurred. They have occasional panels and papers. In this one former CIA Director James Woolsey also spoke.
If into #electricgrid & #energy #security; recent @EMPACTAmerica panel with @SenTedCruz @RepTrentFranks @frankgaffney http://www.centerforsecuritypolicy.org/2014/02/07/american-security-and-the-iranian-bomb-analyzing-threats-at-home-and-abroad/