US election: Authorities seek to separate threats from bluster | US & Canada

When former special agent Tom O’Connor held a training session for new recruits this month at the Federal Bureau of Investigation’s Virginia headquarters, he turned to a key example to underscore the threat of domestic violent attacks: The October 2018 mass shooting at a synagogue in Pittsburgh, Pennsylvania. The shooting, which killed 11 worshippers making it the deadliest attack on the Jewish