john: donna murch of rutgers university. thank you very much. >> thank you.s truly my pleasure. ♪ john: that is pbs news weekend for this sunday. i am john yang. for all my colleagues, thanks for joining us. have a good week. >> major funding for pbs news weekend has been provided by -- >> cunard is a proud supporter of public television. on a voyage with cunard, the world awaits. a world of flavor, diverse destinations, and immersive experiences. a world of leisure and british style. all with cunard's white star service. narco and with the ongoing support of these individuals and institutions. this program was made possible by the corporation for public broadcasting and by contributions to your pbs station from viewers like you. thank you. [captioning performed by the national captioning institute, which is responsible for its caption content and accuracy.] >> you' actually turn the clock around and feel younger. woman, voice-over: i was doing exercise on pbs, and miranda showed up, and she changed my life. second woman, voice-over: she was discussing a tech