A revealing look at the Chinese government’s mass imprisonment of an estimated two million Uyghurs and other Muslims, with undercover footage inside China's secretive Xinjiang region. This journalism is made possible by viewers like you. Support your local PBS station here: www.pbs.org/donate Love FRONTLINE? Find us on the PBS Video App where there are more than 250 FRONTLINE documentaries available for you to watch any time: to.pbs.org/FLVideoApp Subscribe on YouTube: bit.ly/1BycsJW #Uyghur #Xinjiang #Documentary Experts have described it as the largest mass incarceration of an ethnic group since the Holocaust. Now, with undercover footage and firsthand accounts from survivors of China's detention camps, FRONTLINE investigates the Chinese Communist regime’s detention of Muslims — and its use and testing of sophisticated surveillance technology against the Uyghur community. Instagram: www.instagram.com/frontlinepbs Twitter: twitter.com/frontlinepbs Facebook: www.facebook.com/frontline FRONTLINE is streaming more than 200 documentaries online, for free, here: to.pbs.org/hxRvQP Funding for FRONTLINE is provided through the support of PBS viewers and by the Corporation for Public Broadcasting. Major funding for FRONTLINE is provided by the John D. and Catherine T. MacArthur Foundation and the Ford Foundation. Additional funding is provided by the Abrams Foundation, the Park Foundation, The John and Helen Glessner Family Trust, the Heising-Simons Foundation, and the FRONTLINE Journalism Fund with major support from Jon and Jo Ann Hagler on behalf of the Jon L. Hagler Foundation.