This sixth edition now features a new two-colour interior design and Lowenthal’s reliable and thorough updating. With recent developments in mind, he highlights new challenges facing the intelligence community, including the effects of the Snowden leaks in terms of collection and Congressional oversight, as well as discussing NSA programs, UAVs, and the impact of social media. All transnational issues have been updated, especially to reflect changes in the war on terror and with WMD. New analytic issues receive attention, including Big Data, multi-intelligence analysis, and shifting demands on the work force. A new oversight chapter gives extra scrutiny to the role of the FISA court, OMB, and GAO. Lowenthal also expands coverage of foreign intelligence services, to include more on services in each region of the world