kuzzat's father one of a million chinese citizens who have disappeared. so, i went halfway around the world to figure out what's happening, and found two worlds, full of truth and lies. >> any sign of them behind us yet? they're back now. the chinese government accused of sending people to modern day internment camps. condemned for the crime of being muslim. >> chinese officials deny it, insisting this is about preventing terrorism. it is >> do you consider this torture? >> torture. >> we were granted a rare tour, >> is it possible you could give us -- is it possible you could -- >> next time, next time. >> we quickly discovered. cops are right behind us a lot of people don't want us to find the answers. there's guys running at us right now. we began our search here, in america's capital, where kuzzat spends his life in a kind of limbo. the 35-year-old lives in virginia working as a computer science teacher. coming home to play with his four children every night. at the same time, wondering where his own father may be. >> he send me message from wechat, v