Artificial intelligence lab Anthropic filed suit on Monday challenging a move by the Pentagon last week officially designating the company as a "supply chain risk" after it refused to allow unrestricted military use of its AI system, Claude.  The US Defense Department had demanded Anthropic remove guardrails blocking its AI for functions like autonomous ​weapons or domestic surveillance. Before the deadline for a deal passed on February 27, Anthropic CEO Dario Amodei had warned US Defense