john: alison athey, thank you very much. alison: my pleasure.hn: that is pbs news weekend for this sunday. i'm john yang. for all of my colleagues, thanks for joining us. have a good week. >> maybury -- major funding has been provided by. ♪ 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.] ♪♪ -what makes a journey complete? is it arriving at a destination you've picked on a map? or is it being present in every step that is taken along the way? ♪♪ travel is always more than going somewhere and coming home. it is a practice of learning more about the world we live in