NOVA pulls back the curtain on a top-secret world to examine a chilling new reality of global cyber warfare.

The global cyberwar is heating up, and the stakes are no longer limited to the virtual world of computers. Now, sophisticated cyber weapons unleashed via the Internet can inflict physical damage—destroying control systems that regulate everything from food factories, gas pipelines, power plants and chemical facilities to the elevators in our buildings. In a gripping new documentary, NOVA gains unprecedented and unrestricted access to an archive of top-secret NSA documents taken by former cyber warrior, Edward Snowden. They detail how the United States, its allies and its enemies are all searching for offensive cyber weapons and how America’s quest for dominance may inadvertently be putting the US at risk.