Chapman University Oct 11, 2016
“What Aren’t They Telling Us?”
EXCERPT
“The most prevalent conspiracy theory in the United States is that the government is concealing information about the 9/11 attacks with slightly over half of Americans holding that belief….”
https://blogs.chapman.edu/wilkinson/2016/10/11/what-arent-they-telling-us/
Main Survey Page – http://www.chapman.edu/wilkinson/research-centers/babbie-center/survey-american-fears.aspx