A secret NSA map obtained exclusively by NBC News shows the Chinese government‘s massive cyber assault on all sectors of the U.S economy, including major firms like Google and Lockheed Martin, as well as the U.S. government and military.

The map uses red dots to mark more than 600 corporate, private or government “Victims of Chinese Cyber Espionage” that were attacked over a five-year period, with clusters in America’s industrial centers. The entire Northeast Corridor from Washington to Boston is blanketed in red, as is California’s Silicon Valley, with other concentrations in Dallas, Miami, Chicago, Seattle, L.A. and Detroit. The highest number of attacks was in California, which had almost 50.

Read the article “Secret NSA Map Shows China Cyber Attacks on U.S. Targets” on nbcnews.com.