In His former life Abu Rafiq, a short, stocky 35-year-old who was born and raised in Damascus, ran a successful business selling groceries across Syria. Now he heads to work each day equipped with a camera phone. He walks the streets of Raqqa, the Syrian city that has become the self-styled capital of Islamic State, taking clandestine photographs and videos of anything that exposes the terrorists' lies: bombed-out buildings, empty food stalls, homeless families. He uploads the images to Twitter.The clicks of a camera phone in Syria might seemingly have little to do with what UK Prime Minister David Cameron this week called "the struggle of our generation" in his speech on the world's new counter-extremism strategy, but Rafiq is working on its front line. Raqqa is the heart of an IS propaganda machine so vast and sophisticated it can seep into vulnerable young minds thousands of kilometres away.Rafiq and his men have been operating since the beginning of the year. They aim to disrupt conversations between would-be jihadists and the so-called caliphate they profess to join. It is dangerous work - some activists have already been captured by the terrorists. Earlier this week, according to monitoring group the Syrian Observatory for Human Rights, IS shut down private Wi-Fi access across Raqqa, forcing people into public internet cafés, where they can be better monitored."IS only tells the world what it wants, but we want to tell people what is actually happening," Abu Rafiq, his nom de guerre, said, from an undisclosed location, in his first interview with a British newspaper."They use Twitter, so we go on Twitter to target their propaganda. It is very dangerous because they are everywhere, watching everything. But we will win in the end."For now, the terrorists are winning. Western authorities are still coming to grips with the sophistication of their videos and social media profiles. ..