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Just watching television footage of the terrorist attacks of September 11, 2001, was enough to cause clinically diagnosable stress responses in some people who did not even live near the attacks--let alone the millions of people who did . Like many other major disasters, 9/11 brought with it a host of psychological repercussions, one of the most severe of which has been post-traumatic stress disorder . PTSD is characterized by trouble sleeping, difficulty controlling anger, losing interest in activities, flashbacks, emotional numbness and/or other symptoms

A shadowy terrorist group called Assistants of the Global Jihad claimed responsibility for the bombing of the Norwegian Prime Minister's office and a massacre at a children's day camp via the Internet. A terrorists group has claimed responsibility for today's attacks in Oslo, Norway--which included the bombing of the Prime Minister's office and a massacre at a children's day camp by a gunman dressed as a police officer--using social media.

Italian cops nab Anonymous hackers, Japan finds rare earths key to electronics, Google's missing Realtime search. This and more important news from your Fast Company editors, with updates all day