In a five year period from 2011 to 2016, just twelve percent of terrorist attacks in the United States were perpetrated by Muslims. More than fifty percent, on the other hand, were carried out by Neo-Nazis, white supremacists, or other far right groups. So why do Americans spend so much time worrying about "radical Islamic terrorism?" This week on Hidden Brain, we look at how the media over-covers some acts of terrorism — and quickly forgets others. We also look at some of the psychological reasons we have a hard time putting the threat of terrorism in perspective.