By Robert Norton and Brad Deacon

Last April, an alert employee at a Whole Foods Market in Ann Arbor, Mich., noticed a young man spritz liquid onto food in the hot food bar. The man, 29-year-old Kyle Bessemer, was arrested after publication of a surveillance image showing him carrying a red shopping basket and striding past the avocados. Bessemer told police he mixed a Tomcat rodent poison with water in a bottle of hand sanitizer, and over the past two weeks had sprayed the mixture on open salad and food bars at several local grocery stores. Bessemer told police he thought people were poisoning him, and he ultimately was found unfit to stand trial. This time, nobody got sick, but the specter of “what if?” remains. What if Bessemer had been a “thinking adversary” who researched and carefully planned an operation targeting vulnerable, open salad bars? READ MORE