>> so what we're seeing no is really unprecedented as a human rights atrity in china.ce the cultura revolution, perhaps, not since theananmen incidents of 1989 has there been anything this serious that the world should pay attention to. it's sadat least because china is better than. this china has a tradition of multiculturalism. t 's not leral, western style multiculturalism, ey have a way of managing different groups within one state, and if they would stick to t thay could provide an example of managing dirsity, albeit within an authoritarian context, that in some ways measures up to the wae manage diversity in the west because these are fficult problems everywhere. jim millward, kanat, thank you very much. >> thank you. >> woodruff: we've frequently reported in recentears on incidents of police shootings, gun violence, and community reaction to them. one familiar question that arises in these cases: are police being held to account for their actions? yamiche alcindor looks at one case in dallas.or >> rr: in texas, a rare guilty verdict. followed by an even rarerpo