This article by Naomi Wolfe suggests that many stories that surface and part of a revolving door system between the Intelligence Services and 'Security Manufacturers'.
The news stories, which quickly surface, long enough to cause scary headlines, then vanish before people can learn how often the cases are thrown out. These are stories about "bumbling fantasists", hapless druggies, the aimless, even the virtually homeless and mentally ill, and other marginal characters with not the strongest grip on reality, who have been lured into discourses about violence against America only after assiduous courting, and in some cases outright payment, by undercover FBI or police informants.
See link below . . . and use your browser 'back' button to return to this page.