In 2015, Lesley Stahl traveled to Kenya, where a “mobile money” revolution was sweeping the country. Kenyans were sending and receiving money on their cell phones through the platform M-Pesa, which improved commerce and brought basic necessities to poorer areas.

Next Sunday, 60 Minutes returns to the Cathedral of Notre Dame in Paris, bringing viewers a unique first look at the rebirth of one of the world’s great treasures.

Digital workers in Kenya had to sift through horrific online content to train AI, but say they were underpaid, overworked, and got inadequate mental health support. So they’re fighting back.