On March 15, New Zealand changed forever when a terrorist decided to kill 50 people at two Mosques in Christchurch. That terrorist also livestreamed his attack and it spread online for hours. A lot has been made about how ineffective social media platforms were in containing the video and its copies. Facebook for its part said it removed 1.5 million videos with images from the shooting.  Elizabeth Dwoskin, Silicon Valley correspondent for the Washington Post, joins us for how YouTube handled the situation.  They assembled a team of incident commanders and hit the panic button, disabling recent uploads and cutting out human content moderators letting AI take the driver seat.

Next, we are learning more about the two Boeing 737 Max jet crashes that have grounded the plane from operating.  Increasingly it seems that the culprit was the new MCAS flight control system put in place.  Andrew Freedman, science editor at Axios, joins us for the latest.  Pilots were not adequately trained on how to operate this new system, and now there are investigations into how the plane itself was certified.  It seems time constraints and trying to compete with Airbus pushed the FAA to defer to Boeing in certifying the MCAS system.