Facebook faces big challenge to prevent future U.S. election meddling
February 16, 2018 at 19:59 PM EST
SAN FRANCISCO/WASHINGTON, Feb 16 (Reuters) - The Russian influence operation designed to tamper with the 2016 U.S. presidential election used a combination of old-school espionage tactics and 21st-century technologies that will not be easy to stop, even now that the methods have been exposed, experts said.