A Washington D.C. federal appeals court declined to block the Pentagon's blacklisting of Anthropic on April 8, 2026. Defense Secretary Pete Hegseth designated the Claude AI developer a national security supply-chain risk, barring Pentagon contracts. Anthropic claims this could cost billions in lost business. The court's decision is not final. The blacklisting followed Anthropic's refusal to allow military use of Claude for surveillance or autonomous weapons.