wong ju—xin was one of the leaders of the protests.are until now. translation: 30 years ago there was a student movement here which shocked the world. but all these tourists must have forgotten. they have no way to find out what happened here because the information is censored. what happened here is still so politically sensitive it's safer to do the interview in the car. it was the moment the communist party almost lost its grip on power, rocked by five weeks of massive, peaceful demonstrations. first, senior officials tried meeting the student leaders, including mr wong. then, late at night on the 3rd ofjune, they sent in the army, killing hundreds, possibly thousands, in the effort to retake the square. the following day there was one final act of defiance. it has become one of the most iconic images of our time, except in china. the vast majority of those we ask say they have never seen it. just over there is the spot tank man stood, although you would never know it. the silence and censorship are now central to the official line.