President Trump announced the U.S. government would blacklist Anthropic, in the most consequential and controversial policy decision to date at the intersection of artificial intelligence and national security.The big picture: Anthropic rebuffed the Pentagon's demand to lift all safeguards on the military's use of its model, Claude, due to its concerns about the use of AI for mass domestic surveillance and the development of weapons that fire without human involvement.The intrigue: A source fami...