CBS news has obtained reports that show there's growing online chatter from extremist groups celebrating the recent power attack in North Carolina. #cbsnewsmiami #news #miami #southflorida #florida #northcarolina #ncpowerattack #ncpowergrid #powergrid Visit us on the web and follow us on social media and stay informed: Official Site: http://miami.cbslocal.com/ YouTube: http://www.youtube.com/user/CBSMiami Facebook: https://www.facebook.com/CBSMiami Twitter: https://twitter.com/CBSMiami