U.S. Secretary of State Rex Tillerson denied in an interview on CBS's Face the Nation that the strikes signaled an overhaul of American policy, saying its priority remained to defeat Islamic State militants in the Middle East. The strike was the first time American forces targeted a Syrian government installation in the course of the war. U.S. Treasury officials say they are preparing sanctions in response to the chemical weapons attack, though the Syrian government is already buried under U.S. and E.U. sanctions.