Danny Sullivan just posted an SEW blog entry named A Picture Says 1000 Words About Google's Censorship In China which is show true. He shows a screen capture, side by side (Google China versus Google US) of a search on "tiananmen" at Google Images China versus Google Images. Here it is.
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SEW has a long thread on the topic since its inception named Google Agrees To Chinese Censorship and I started a forum thread just on this Google Images comparison, since I feel that alone is shocking enough.
Forum discussion at Google China: Story Told in Google Images.