Nuclear talks between the US and Iran in Geneva have been "intense" and "serious," according to an Iranian official. The world is still waiting to see if a diplomatic off-ramp can be found, or if the enormous buildup of US military assets in the region will be deployed. 

Meanwhile, details are still coming to light about the regime's bloody January crackdown on protesters. Jomana Karadsheh brings you a chilling report, including testimony from victims' families who say they were forced to lie about how their loved ones died. 

Also on today' show: AI researcher Nate Soares; director Morgan Neville ("Man on the Run"); professor of dermatology Dr. Jean Tang and EB Research Partnership CEO Michael Hund