There's a Tibetan dialect called 'Mustang,' and it's staying alive in the US

With his cropped black hair, button-down shirt, and hipster shoulder bag, it's hard to imagine Nawang was once a 7-year-old sheep herder hoping to score sweets from a visiting foreigner. But one day, he made a life-changing chocolate request from an Oxford professor who had come to his village to conduct fieldwork.