Ground zero. Interest for the effects of terrorism on mental health was sparked by the events of 9/11.
Terrorism does not increase PTSD more than expected - health science news

By reviewing more than 400 scientific publications describing the association between acts of terrorism and mental health, scientists conclude that terrorims does not cause more post-traumatic stress disorder (PTSD) than would be expected from any other traumatizing or distressing event. This observation goes against the much heard view in the media that terrorist attacks negatively impact on peoples’ psychological wellbeing. The scientists argue that policy-makers should focus more on promoting social bonds and people’s resilience in response to terrorist attacks, rather than stressing peoples’ psychological vulnerability.

Read the full story: University of Bath
Scientific publication: The Lancet Psychiatry