The original title was too long and then when I considered how to edit it I realized that the original title was too obscure for anyone not steeped in that particular literature (“photo 51”)
Edit: Since https://news.ycombinator.com/item?id=49969073 was posted earlier and the comments there were more substantive, I've merged the thread thither and re-upped that one.
I have also re-upped 2 other excellent submissions you made - thank you!
At any rate, suppression of such comments is to be expected for CJ style groups but not for open-minded discussions.
Same applies to my dead comments 49953689, 49954141, as well as 49938615 and 49941900, on the subject of Hiroshima. If you cannot even quote top experts and administrators with first-hand knowledge (such as A. de Seversky and general C. Sams) just because they contradict the prevailing narrative, then what kind of discussion is that? And the flavour of "curiosity" involved must be very peculiar.
Frankly, my impression is that some people are using or abusing the "flag" feature and perhaps other features they may have at their disposal to remove opinions and facts they don't like or don't even want to see published.