Nobody is firing guns, but the Russians certainly seem to be engaged in a cyber war with the United States.
The efforts to create argument and discord extend into the vaccination debate here. Researchers reported recently that Twitter bots and trolls got involved in passing along information, solid and not, to amp up the battle between pro- and anti-vaccination forces. And it's been going on for years.
David Broniatowski at George Washington University was the lead writer on the research; he is our guest.