Various papers report that dozens of Islamic extremists have been killed in fighting around a northern military base, activists and Syrian state media reported. | Various papers report that US airstrikes against Islamic State (IS) extremists in Iraq continued as intelligence agencies on both sides of the Atlantic worked to identify the British jihadist believed to have carried out the brutal murder of American journalist James Foley. British spies are heavily involved in efforts to identify Mr Foley's killer and his group of extremists, with the Cheltenham-based eavesdropping agency Government Communications Headquarters playing a vital role in intercepting any electronic communications between jihadists in Syria and Iraq. | Various papers report that the Americans have raised the possibility of pursuing Islamic State militants in Syria as well as Iraq. | Various media report that BAE Systems is developing a human-like 'skin' for aircraft, allowing planes to detect any damage and 'feel' the world around. | The Times reports that around 280 Muslims joined the UK Armed Forces over the last 3 years, compared to an estimated 500 a year who are joining IS. | The Daily Mail has published a feature on the development of remotely piloted air systems and unmanned aerial vehicles, considering what they are currently used for and what they are likely to be used for in the future.