russia had thousands of paid internet trolls, people filling americans twitter feeds and your facebook news feeds, with headlines that were completely made up. and vladimir putin tonight with a message for america, borrowing words from what an american president has said before. here's abc's senior justice correspondent pierre thomas. >> reporter: tonight, the stunning warning that russia not only tried to hijack the last u.s. election, but will try again. >> this is not fake news. this is actually what happened to us. >> reporter: the russians, u.s. officials believe, using a cyber army against americans. >> the russians employed thousands of paid internet trolls and bot nets to push out disinformation and fake news at a high volume, focusing this material onto your twitter and facebook feeds. >> reporter: and a hearing witness, former fbi agent clint watts, even accused trump in engaging in disinformation himself. >> part of the reason active measures have worked in this