In Syria, a U.S. fighter shot down a Syrian warplane Sunday in the latest direct attack on a Syrian government target. The Pentagon said it downed the plane after it bombed U.S.-backed, anti-government rebels. Meanwhile, the United Nations said an estimated 200,000 civilians remained trapped in the city of Raqqa, as a U.S.-led coalition pounds the city in a campaign against ISIS. The U.N. says the airstrikes have killed at least 300 civilians in Raqqa since March.