Ms. Lee, a Hong Kong school teacher, showed this image above to first-year middle-school students and asked them to decipher the meaning. In three separate classes, they believed the image was of the war in Iraq.

Did they ever imagine that this horrible experience had occurred previously in the "flourishing" motherland of today!? "Have you seen this photograph before?" I asked.

In each class, there were maybe one or two students who raised their hands to say: "Oh, this seems to be a June 4th photograph." "Did your elementary school teachers tell you about June 4th?" No. Of course, the syllabus would not include any historical incident with an "unsettled verdict."

LfC: "If one is unable to associate the images with the Tiananmen Massacre, there are two possibilities: either one has been living outside China and has never been exposed to news media since 1989, or one is living in China."

Given the current state of information and education in Vietnam, I suspect that if a similar test were given to students here, the results would be sadly as dismal.

Source
ESWN. Tiananmen Tank Men