. >> these are trull truly internment camps. and when the world finds out, we will all regret. >> reporter: the uighur's area is crucial. experts say government policies encouraging them to move west created tension. >> they were dispossessed of their land. in many ways they were excluded from participating in new economies. >> reporter: china blamed groups for an increase in violence and it gave the government a target. >> they were seen as potential terrorists. >> reporter: i first started covering the conflict this is this region several years ago. driving here you can see there are police officers everywhere, in fact, put your camera down. put your camera down. by 2014, china began building the camps. is there torture? >> yes. >> reporter: what kind? >> physical torture. all of the people who are being detained in these facilities are being subjected to degradation and humiliation of a kind that would break just about anyone. >> reporter: in kazakhstan, several men demonstrate the severe postures they say they were forced to