After the shooting in Orlando, and mass shootings in the past, there is intense focus on mental illness, and questions of whether mental illness can be linked to mass shootings. On this week's Please Explain, David Kessler, former FDA Commissioner of 20 years, will discuss mental illness and emotional anxiety, and explain how certain stimuli can capture our attention, and even control our actions. Dr. Kessler’s latest book is “Capture: Unraveling the Mystery of Mental Suffering.” He'll reveal how the psychological phenomenon of "capture" influences addiction, abuse, and can even lead to violence, like mass shootings.