On this week's "60 Minutes," Nicaraguan dictator Daniel Ortega has tightened his grip on power by making dozens of arrests of political opponents, journalists and protesters. Sharyn Alfonsi speaks to the wives of two imprisoned men who were planning to oppose Ortega in next week's elections. Lesley Stahl reports on a group of architects inspired by a project in Rwanda to create a new model of design. And in an interview with Anderson Cooper, world-renowned author Yuval Harari warns humans will be "hacked" if artificial intelligence is not globally regulated.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.