I just stumbled across this article in The Asahi Shimbun about Cambridge-based Union for Concerned Scientists, a nonprofit science advocacy organization that is asking people to send a letter to President Obama urging him to visit Japan in early August for the 70th anniversary of the bombings of Hiroshima and Nagasaki and to take our nuclear weapons off hair-trigger alert. As far as I can tell from a quick Google News search this hasn't been picked up by the US media at all.
It's a nice thought but given the President's hectic schedule it seems a bit late. And unfortunately, some Americans are too busy celebrating the US's win at the FIFA Women's World Cup with racist tweets about Pearl Harbor, Hiroshima, and Nagasaki. Classy.
When JREX and Tewassa screened Hideki Ito's X Years Later in 2013 they showed an extremely unnerving animated short by Isao Hashimoto titled "1945-1998" which showed nearly all of the nuclear detonations worldwide during that time period (according to this YouTube user, the animation is missing a few). The final US count:
1,032 (317 more than the next highest count - Russia at 715).