The U.S.-led bombing campaign in Iraq and Syria has seen its biggest day so far with British warplanes joining the attack. At least 24 strikes were launched between the two countries, where the Islamic State controls a vast stretch of territory. Britain took part in the strikes for the first time since its Parliament voted to authorize the campaign on Friday. The strikes today have hit towns including Syria’s Kobani, which has come under a sustained Islamic State assault that has forced tens of thousands of Syrian Kurds to flee.