Investigators are trying to figure out who targeted power systems in Washington state. More than 14,000 customers lost power on Christmas Day after someone vandalized four substations. ABC's Zohreen Shah shares the new concerns surrounding the nation's power grid. Subscribe: https://www.youtube.com/user/WVECTV/?sub_confirmation=1 Download the 13News Now App: http://bit.ly/13NewsNowApp Check out our website: https://www.13newsnow.com/ Like us on Facebook: https://www.facebook.com/13NewsNow/ Follow us on Twitter: https://twitter.com/13newsnow Follow us on Instagram: https://www.instagram.com/13newsnow/