Islamic State Has Full Control of Syria's Palmyra

Islamic State fighters tightened their grip on the historic Syrian city of Palmyra on Thursday and overran Iraqi government defenses east of the provincial capital, which they seized five days earlier. The twin successes not only pile pressure on Damascus and Baghdad but throw doubt on a U.S. strategy of relying almost exclusively on air strikes to support the fight against Islamic State. The White House said the seizure of Palmyra was a setback for U.S.-led coalition forces in their fight against Islamic State. President Barack Obama disagrees with Republicans demanding he send ground troops to fight the Islamist militants.The U.S. military said U.S. and coalition forces had conducted 18 air strikes against Islamic State targets in Syria and Iraq since Wednesday.