The Islamic State of Iraq and Syria (ISIS) shot down a Syrian regime fighter jet conducting airstrikes on the group’s stronghold of Raqqa on Tuesday, the Syrian Observatory for Human Rights reported. The Britain-based monitor said: “It is the first aircraft shot down since the regime launched air strikes against the jihadists in July following their declaration of a caliphate in late June.” Observatory director Rami Abdel Rahman told AFP that the plane was carrying out strikes on the ISIS stronghold of Raqa when it was hit. It crashed into a house in the Euphrates Valley city, the sole provincial...