NEW: The DOJ announces more than 350 arrests worldwide following an international operation targeting fentanyl and opioid traffickers on the dark web. Speaking

NEW: The DOJ announces more than 350 arrests worldwide following an international operation targeting fentanyl and opioid traffickers on the dark web. Speaking at a DOJ and FBI press conference, Attorney General Todd Blanche says law enforcement also seized drugs, weapons and more than $234 million…