When it comes to hibakusha and the victorious Americans, one can expect a portrait of contrasts.

But as time heals the wounds of war, the resulting scar tissue has concealed many of the differences of opinion — both about the necessity of the atomic bombings and the need for an apology.

Now, with U.S. President Barack Obama poised to be the first sitting American leader to pay his respects at Hiroshima, the world is getting a fresh look at how the two nations have dealt with the aftermath of the traumatic attack.