In “Investigators Looking at How NYC Terror Suspect Found Radical Islam Online” (The Wall Street Journal, 12 Dec. 2017), K2 Intelligence explains that instructions on carrying out attacks have long been easily available. The Anarchist Cookbook, published in 1971, which included instructions for manufacturing explosives, was cited as an example.
While forcing websites to remove content is an unlikely solution due to free speech concerns, posting materials online that counter the messages of the terrorists might be a more effective counterterrorism move.
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