More than 30 OpenAI and Google DeepMind employees filed a statement Monday supporting Anthropic’s lawsuit against the U.S. Defense Department after the federal agency labeled the AI firm a supply-chain risk, according to court filings. “The government’s designation of Anthropic as a supply chain risk was an improper and arbitrary use of power that has serious ramifications for our industry,” reads the brief, whose signatories include Google DeepMind chief scientist Jeff Dean. Late last week, the Pentagon labeled Anthropic a supply-chain risk — usually reserved for foreign adversaries — after the AI firm refused to allow the Department of Defense (DOD) to use its technology for mass surveillance of Americans or autonomously firing weapons. The DOD had argued that it should be able to use AI for any “lawful” purpose and not be constrained by a private contractor.…