Tonight on Amanpour and Company: Svetlana Tikhanovskaya, Belarusian opposition leader; Report: Ransomwre on the Rise: Chris Krebs, Partner, Krebs Stamos Group / Former DHS Senior Cybersecurity Official; Kurtis Minder, CEO, GroupSense / Ransomware negotiator. Walter Isaacson interviews Dr. Patrick Soon-Shiong, Executive Chairman, ImmunityBio.