Marina Abramović; Kimani Gray Fallout; Valle Verdict

Councilman Jumaane Williams talks to reporters after a heated with Commissioner Kelly during a City Council hearing.

Performance artist Marina Abramović discusses her new project blending art and neuroscience called "Measuring the Magic of Mutual Gaze." During the interview, both her and Brian's brain waves will be recorded and explored in real-time. Plus: Council Member Jumaane Williams on the vigil in response to the shooting of Kimani Gray; what the Gilberto Valle trial tells us about "thought crime;" and bioethicist Nita Farahany continues a series on medical ethics.