https://www.bing.com/images/search?q=tank%20man%20china
(For those who don't see results, this is my screen grab of the above at 18:12 UTC : https://imgur.com/a/3tzPV49)
Also, "Tiananmen Square massacre" still returns some image results:
https://www.bing.com/images/search?q=Tiananmen+Square+massac...
Therefore, the tweak for "tank man" doesn't seem to make any sense since all the other phrases to get to the same sensitive topic are not suppressed.
It's surprising and shameful to me that Microsoft would be censoring so brazenly even in US search results. Also embarrassing on a technical level that their censorship is this bad. It's also pretty bad at image search compared to Google (compare Google Images "tank guy" to Bing's).
Companies that sell their soul for money are one thing, but Bing has ~2% market share in China, and for this they are crudely censoring search results worldwide? Madness.