As a sophomore in high school, Benjamin Roberts '10 became fascinated with exits and the role they play in emergency evacuations. Wed, 03 Jan 2007 12:00:00 -0800 alumni,alumni,Benjamin Roberts '10,Blocked Exit Syndrome,Dr. Uri Wilensky,Dr. Michael Gizzi,technology,Larry Desimone,Barbara Griffin Roberts '80,Richard G. Gann, Wed, 03 Jan 2007 12:00:00 -0800