Hmmm. Thank you. Hope they were only referring to a commemoration of that fateful day that PASSED. I do not know much about any of the yahoo groups.
I think it is referring to the dropping of the bomb on Japan. I believe this originally came from al-Jazeera.
The other slide shows other nations that have them "we also have"... (US, Russia, China, Britain, Israel, India, Pakistan. The sign being held front of the Japanese flag says (roughly) "We condemn nuclear development."