It's the anniversary of the Hiroshima Bombing that helped end the War in the Pacific. On June 30, 1945, the NYT headlined
Hiroshima was the answer to that. Miracle of Deliverance: The Case for the Bombing of Hiroshima and Nagasaki, by Stephen Harper (not the Canadian PM), said that the bombing, along with then Nagasaki Bombing, anniversary in three days, saved up to a million Allied lives, and up to seven million Japanese lives.
This is the subject of much guilt and apologies by Americans, but it shouldn't be.
Here are some previous posts we've done on the subject.