Sen. Elizabeth Warren, D-Mass., sent a letter to Defense Secretary Pete Hegseth on Monday demanding information about the Pentagon’s reported decision to give Elon Musk’s xAI access to classified networks. In the letter , Warren raised concerns that xAI and its AI-powered chatbot, Grok, could present critical safety and reliability risks to America’s military. Warren cited the possibility that Grok could leak classified information to adversaries, be manipulated based on biased or inaccurate