SEE SOMETHING, SAY NOTHING.

The author discusses attempts to identify suspicious behavior in locations such as U.S. airport terminals, arguing that the U.S. government is encouraging people to watch for suspicious behavior without clearly defining suspicious behavior. Suspicious activities such as note-taking, expressing interest in extremist ideologies, and expressing interest in ammonium nitrate are mentioned. Topics include the U.S. Transportation Security Administration, the identification of terrorists, and freedom of expression.