In the second and final part of our series "The Black Gate: A Uyghur's Family's Story," a Uyghur man returns to China to find his children who've been sent to "boarding schools" and his wife who's spent two years in prison. In the Xinjiang region of western China, hundreds of thousands of Uyghurs and other Muslim ethnic groups have been arrested and detained. Many are still desperately searching for their families.
