Although the deep web also has a powerful liberating potential, especially since the recent NSA revelations have brought the extent of government surveillance into sharp focus. Surfing along its supposedly safe corridors gives you a strange, exhilarating sensation; probably not unlike how the first internet users felt a quarter of a century ago. Professor Walden has argued that the deep web was vital in the Arab Spring uprising, by allowing dissidents to communicate and unite without being detected. Many of the videos filmed during the Syrian revolution in 2011 were first securely posted on the deep web before being transferred to YouTube.